1179 lines
32 KiB
C
1179 lines
32 KiB
C
/* setup.c: FRV specific setup
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*
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* Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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* - Derived from arch/m68k/kernel/setup.c
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <generated/utsrelease.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/fb.h>
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#include <linux/console.h>
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#include <linux/genhd.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/major.h>
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#include <linux/bootmem.h>
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#include <linux/highmem.h>
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#include <linux/seq_file.h>
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#include <linux/serial.h>
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#include <linux/serial_core.h>
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#include <linux/serial_reg.h>
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#include <linux/serial_8250.h>
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#include <asm/setup.h>
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#include <asm/irq.h>
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#include <asm/sections.h>
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#include <asm/pgalloc.h>
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#include <asm/busctl-regs.h>
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#include <asm/serial-regs.h>
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#include <asm/timer-regs.h>
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#include <asm/irc-regs.h>
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#include <asm/spr-regs.h>
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#include <asm/mb-regs.h>
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#include <asm/mb93493-regs.h>
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#include <asm/gdb-stub.h>
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#include <asm/io.h>
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#ifdef CONFIG_BLK_DEV_INITRD
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#include <asm/pgtable.h>
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#endif
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#include "local.h"
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#ifdef CONFIG_MB93090_MB00
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static void __init mb93090_display(void);
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#endif
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#ifdef CONFIG_MMU
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static void __init setup_linux_memory(void);
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#else
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static void __init setup_uclinux_memory(void);
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#endif
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#ifdef CONFIG_MB93090_MB00
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static char __initdata mb93090_banner[] = "FJ/RH FR-V Linux";
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static char __initdata mb93090_version[] = UTS_RELEASE;
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int __nongprelbss mb93090_mb00_detected;
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#endif
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const char __frv_unknown_system[] = "unknown";
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const char __frv_mb93091_cb10[] = "mb93091-cb10";
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const char __frv_mb93091_cb11[] = "mb93091-cb11";
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const char __frv_mb93091_cb30[] = "mb93091-cb30";
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const char __frv_mb93091_cb41[] = "mb93091-cb41";
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const char __frv_mb93091_cb60[] = "mb93091-cb60";
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const char __frv_mb93091_cb70[] = "mb93091-cb70";
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const char __frv_mb93091_cb451[] = "mb93091-cb451";
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const char __frv_mb93090_mb00[] = "mb93090-mb00";
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const char __frv_mb93493[] = "mb93493";
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const char __frv_mb93093[] = "mb93093";
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static const char *__nongprelbss cpu_series;
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static const char *__nongprelbss cpu_core;
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static const char *__nongprelbss cpu_silicon;
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static const char *__nongprelbss cpu_mmu;
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static const char *__nongprelbss cpu_system;
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static const char *__nongprelbss cpu_board1;
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static const char *__nongprelbss cpu_board2;
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static unsigned long __nongprelbss cpu_psr_all;
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static unsigned long __nongprelbss cpu_hsr0_all;
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unsigned long __nongprelbss pdm_suspend_mode;
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unsigned long __nongprelbss rom_length;
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unsigned long __nongprelbss memory_start;
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unsigned long __nongprelbss memory_end;
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unsigned long __nongprelbss dma_coherent_mem_start;
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unsigned long __nongprelbss dma_coherent_mem_end;
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unsigned long __initdata __sdram_old_base;
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unsigned long __initdata num_mappedpages;
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char __initdata command_line[COMMAND_LINE_SIZE];
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char __initdata redboot_command_line[COMMAND_LINE_SIZE];
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#ifdef CONFIG_PM
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#define __pminit
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#define __pminitdata
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#define __pminitconst
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#else
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#define __pminit __init
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#define __pminitdata __initdata
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#define __pminitconst __initconst
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#endif
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struct clock_cmode {
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uint8_t xbus, sdram, corebus, core, dsu;
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};
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#define _frac(N,D) ((N)<<4 | (D))
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#define _x0_16 _frac(1,6)
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#define _x0_25 _frac(1,4)
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#define _x0_33 _frac(1,3)
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#define _x0_375 _frac(3,8)
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#define _x0_5 _frac(1,2)
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#define _x0_66 _frac(2,3)
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#define _x0_75 _frac(3,4)
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#define _x1 _frac(1,1)
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#define _x1_5 _frac(3,2)
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#define _x2 _frac(2,1)
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#define _x3 _frac(3,1)
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#define _x4 _frac(4,1)
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#define _x4_5 _frac(9,2)
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#define _x6 _frac(6,1)
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#define _x8 _frac(8,1)
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#define _x9 _frac(9,1)
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int __nongprelbss clock_p0_current;
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int __nongprelbss clock_cm_current;
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int __nongprelbss clock_cmode_current;
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#ifdef CONFIG_PM
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int __nongprelbss clock_cmodes_permitted;
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unsigned long __nongprelbss clock_bits_settable;
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#endif
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static struct clock_cmode __pminitdata undef_clock_cmode = { _x1, _x1, _x1, _x1, _x1 };
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static struct clock_cmode __pminitdata clock_cmodes_fr401_fr403[16] = {
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[4] = { _x1, _x1, _x2, _x2, _x0_25 },
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[5] = { _x1, _x2, _x4, _x4, _x0_5 },
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[8] = { _x1, _x1, _x1, _x2, _x0_25 },
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[9] = { _x1, _x2, _x2, _x4, _x0_5 },
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[11] = { _x1, _x4, _x4, _x8, _x1 },
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[12] = { _x1, _x1, _x2, _x4, _x0_5 },
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[13] = { _x1, _x2, _x4, _x8, _x1 },
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};
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static struct clock_cmode __pminitdata clock_cmodes_fr405[16] = {
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[0] = { _x1, _x1, _x1, _x1, _x0_5 },
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[1] = { _x1, _x1, _x1, _x3, _x0_25 },
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[2] = { _x1, _x1, _x2, _x6, _x0_5 },
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[3] = { _x1, _x2, _x2, _x6, _x0_5 },
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[4] = { _x1, _x1, _x2, _x2, _x0_16 },
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[8] = { _x1, _x1, _x1, _x2, _x0_16 },
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[9] = { _x1, _x2, _x2, _x4, _x0_33 },
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[12] = { _x1, _x1, _x2, _x4, _x0_33 },
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[14] = { _x1, _x3, _x3, _x9, _x0_75 },
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[15] = { _x1, _x1_5, _x1_5, _x4_5, _x0_375 },
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#define CLOCK_CMODES_PERMITTED_FR405 0xd31f
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};
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static struct clock_cmode __pminitdata clock_cmodes_fr555[16] = {
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[0] = { _x1, _x2, _x2, _x4, _x0_33 },
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[1] = { _x1, _x3, _x3, _x6, _x0_5 },
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[2] = { _x1, _x2, _x4, _x8, _x0_66 },
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[3] = { _x1, _x1_5, _x3, _x6, _x0_5 },
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[4] = { _x1, _x3, _x3, _x9, _x0_75 },
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[5] = { _x1, _x2, _x2, _x6, _x0_5 },
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[6] = { _x1, _x1_5, _x1_5, _x4_5, _x0_375 },
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};
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static const struct clock_cmode __pminitconst *clock_cmodes;
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static int __pminitdata clock_doubled;
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static struct uart_port __pminitdata __frv_uart0 = {
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.uartclk = 0,
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.membase = (char *) UART0_BASE,
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.irq = IRQ_CPU_UART0,
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.regshift = 3,
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.iotype = UPIO_MEM,
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
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};
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static struct uart_port __pminitdata __frv_uart1 = {
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.uartclk = 0,
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.membase = (char *) UART1_BASE,
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.irq = IRQ_CPU_UART1,
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.regshift = 3,
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.iotype = UPIO_MEM,
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
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};
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#if 0
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static void __init printk_xampr(unsigned long ampr, unsigned long amlr, char i_d, int n)
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{
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unsigned long phys, virt, cxn, size;
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#ifdef CONFIG_MMU
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virt = amlr & 0xffffc000;
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cxn = amlr & 0x3fff;
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#else
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virt = ampr & 0xffffc000;
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cxn = 0;
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#endif
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phys = ampr & xAMPRx_PPFN;
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size = 1 << (((ampr & xAMPRx_SS) >> 4) + 17);
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printk("%cAMPR%d: va %08lx-%08lx [pa %08lx] %c%c%c%c [cxn:%04lx]\n",
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i_d, n,
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virt, virt + size - 1,
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phys,
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ampr & xAMPRx_S ? 'S' : '-',
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ampr & xAMPRx_C ? 'C' : '-',
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ampr & DAMPRx_WP ? 'W' : '-',
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ampr & xAMPRx_V ? 'V' : '-',
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cxn
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);
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}
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#endif
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/*****************************************************************************/
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/*
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* dump the memory map
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*/
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static void __init dump_memory_map(void)
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{
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#if 0
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/* dump the protection map */
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printk_xampr(__get_IAMPR(0), __get_IAMLR(0), 'I', 0);
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printk_xampr(__get_IAMPR(1), __get_IAMLR(1), 'I', 1);
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printk_xampr(__get_IAMPR(2), __get_IAMLR(2), 'I', 2);
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printk_xampr(__get_IAMPR(3), __get_IAMLR(3), 'I', 3);
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printk_xampr(__get_IAMPR(4), __get_IAMLR(4), 'I', 4);
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printk_xampr(__get_IAMPR(5), __get_IAMLR(5), 'I', 5);
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printk_xampr(__get_IAMPR(6), __get_IAMLR(6), 'I', 6);
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printk_xampr(__get_IAMPR(7), __get_IAMLR(7), 'I', 7);
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printk_xampr(__get_IAMPR(8), __get_IAMLR(8), 'I', 8);
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printk_xampr(__get_IAMPR(9), __get_IAMLR(9), 'i', 9);
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printk_xampr(__get_IAMPR(10), __get_IAMLR(10), 'I', 10);
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printk_xampr(__get_IAMPR(11), __get_IAMLR(11), 'I', 11);
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printk_xampr(__get_IAMPR(12), __get_IAMLR(12), 'I', 12);
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printk_xampr(__get_IAMPR(13), __get_IAMLR(13), 'I', 13);
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printk_xampr(__get_IAMPR(14), __get_IAMLR(14), 'I', 14);
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printk_xampr(__get_IAMPR(15), __get_IAMLR(15), 'I', 15);
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printk_xampr(__get_DAMPR(0), __get_DAMLR(0), 'D', 0);
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printk_xampr(__get_DAMPR(1), __get_DAMLR(1), 'D', 1);
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printk_xampr(__get_DAMPR(2), __get_DAMLR(2), 'D', 2);
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printk_xampr(__get_DAMPR(3), __get_DAMLR(3), 'D', 3);
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printk_xampr(__get_DAMPR(4), __get_DAMLR(4), 'D', 4);
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printk_xampr(__get_DAMPR(5), __get_DAMLR(5), 'D', 5);
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printk_xampr(__get_DAMPR(6), __get_DAMLR(6), 'D', 6);
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printk_xampr(__get_DAMPR(7), __get_DAMLR(7), 'D', 7);
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printk_xampr(__get_DAMPR(8), __get_DAMLR(8), 'D', 8);
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printk_xampr(__get_DAMPR(9), __get_DAMLR(9), 'D', 9);
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printk_xampr(__get_DAMPR(10), __get_DAMLR(10), 'D', 10);
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printk_xampr(__get_DAMPR(11), __get_DAMLR(11), 'D', 11);
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printk_xampr(__get_DAMPR(12), __get_DAMLR(12), 'D', 12);
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printk_xampr(__get_DAMPR(13), __get_DAMLR(13), 'D', 13);
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printk_xampr(__get_DAMPR(14), __get_DAMLR(14), 'D', 14);
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printk_xampr(__get_DAMPR(15), __get_DAMLR(15), 'D', 15);
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#endif
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#if 0
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/* dump the bus controller registers */
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printk("LGCR: %08lx\n", __get_LGCR());
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printk("Master: %08lx-%08lx CR=%08lx\n",
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__get_LEMBR(), __get_LEMBR() + __get_LEMAM(),
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__get_LMAICR());
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int loop;
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for (loop = 1; loop <= 7; loop++) {
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unsigned long lcr = __get_LCR(loop), lsbr = __get_LSBR(loop);
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printk("CS#%d: %08lx-%08lx %c%c%c%c%c%c%c%c%c\n",
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loop,
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lsbr, lsbr + __get_LSAM(loop),
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lcr & 0x80000000 ? 'r' : '-',
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lcr & 0x40000000 ? 'w' : '-',
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lcr & 0x08000000 ? 'b' : '-',
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lcr & 0x04000000 ? 'B' : '-',
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lcr & 0x02000000 ? 'C' : '-',
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lcr & 0x01000000 ? 'D' : '-',
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lcr & 0x00800000 ? 'W' : '-',
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lcr & 0x00400000 ? 'R' : '-',
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(lcr & 0x00030000) == 0x00000000 ? '4' :
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(lcr & 0x00030000) == 0x00010000 ? '2' :
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(lcr & 0x00030000) == 0x00020000 ? '1' :
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'-'
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);
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}
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#endif
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#if 0
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printk("\n");
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#endif
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} /* end dump_memory_map() */
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/*****************************************************************************/
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/*
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* attempt to detect a VDK motherboard and DAV daughter board on an MB93091 system
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*/
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#ifdef CONFIG_MB93091_VDK
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static void __init detect_mb93091(void)
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{
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#ifdef CONFIG_MB93090_MB00
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/* Detect CB70 without motherboard */
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if (!(cpu_system == __frv_mb93091_cb70 && ((*(unsigned short *)0xffc00030) & 0x100))) {
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cpu_board1 = __frv_mb93090_mb00;
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mb93090_mb00_detected = 1;
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}
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#endif
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#ifdef CONFIG_FUJITSU_MB93493
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cpu_board2 = __frv_mb93493;
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#endif
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} /* end detect_mb93091() */
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#endif
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/*****************************************************************************/
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/*
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* determine the CPU type and set appropriate parameters
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*
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* Family Series CPU Core Silicon Imple Vers
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* ----------------------------------------------------------
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* FR-V --+-> FR400 --+-> FR401 --+-> MB93401 02 00 [1]
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* | | |
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* | | +-> MB93401/A 02 01
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* | | |
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* | | +-> MB93403 02 02
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* | |
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* | +-> FR405 ----> MB93405 04 00
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* |
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* +-> FR450 ----> FR451 ----> MB93451 05 00
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* |
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* +-> FR500 ----> FR501 --+-> MB93501 01 01 [2]
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* | |
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* | +-> MB93501/A 01 02
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* |
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* +-> FR550 --+-> FR551 ----> MB93555 03 01
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*
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* [1] The MB93401 is an obsolete CPU replaced by the MB93401A
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* [2] The MB93501 is an obsolete CPU replaced by the MB93501A
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*
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* Imple is PSR(Processor Status Register)[31:28].
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* Vers is PSR(Processor Status Register)[27:24].
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*
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* A "Silicon" consists of CPU core and some on-chip peripherals.
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*/
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static void __init determine_cpu(void)
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{
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unsigned long hsr0 = __get_HSR(0);
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unsigned long psr = __get_PSR();
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/* work out what selectable services the CPU supports */
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__set_PSR(psr | PSR_EM | PSR_EF | PSR_CM | PSR_NEM);
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cpu_psr_all = __get_PSR();
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__set_PSR(psr);
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__set_HSR(0, hsr0 | HSR0_GRLE | HSR0_GRHE | HSR0_FRLE | HSR0_FRHE);
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cpu_hsr0_all = __get_HSR(0);
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__set_HSR(0, hsr0);
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/* derive other service specs from the CPU type */
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cpu_series = "unknown";
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cpu_core = "unknown";
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cpu_silicon = "unknown";
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cpu_mmu = "Prot";
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cpu_system = __frv_unknown_system;
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clock_cmodes = NULL;
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clock_doubled = 0;
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#ifdef CONFIG_PM
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clock_bits_settable = CLOCK_BIT_CM_H | CLOCK_BIT_CM_M | CLOCK_BIT_P0;
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#endif
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switch (PSR_IMPLE(psr)) {
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case PSR_IMPLE_FR401:
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cpu_series = "fr400";
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cpu_core = "fr401";
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pdm_suspend_mode = HSR0_PDM_PLL_RUN;
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switch (PSR_VERSION(psr)) {
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case PSR_VERSION_FR401_MB93401:
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cpu_silicon = "mb93401";
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cpu_system = __frv_mb93091_cb10;
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clock_cmodes = clock_cmodes_fr401_fr403;
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clock_doubled = 1;
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break;
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case PSR_VERSION_FR401_MB93401A:
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cpu_silicon = "mb93401/A";
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cpu_system = __frv_mb93091_cb11;
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clock_cmodes = clock_cmodes_fr401_fr403;
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break;
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case PSR_VERSION_FR401_MB93403:
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cpu_silicon = "mb93403";
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#ifndef CONFIG_MB93093_PDK
|
|
cpu_system = __frv_mb93091_cb30;
|
|
#else
|
|
cpu_system = __frv_mb93093;
|
|
#endif
|
|
clock_cmodes = clock_cmodes_fr401_fr403;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case PSR_IMPLE_FR405:
|
|
cpu_series = "fr400";
|
|
cpu_core = "fr405";
|
|
pdm_suspend_mode = HSR0_PDM_PLL_STOP;
|
|
|
|
switch (PSR_VERSION(psr)) {
|
|
case PSR_VERSION_FR405_MB93405:
|
|
cpu_silicon = "mb93405";
|
|
cpu_system = __frv_mb93091_cb60;
|
|
clock_cmodes = clock_cmodes_fr405;
|
|
#ifdef CONFIG_PM
|
|
clock_bits_settable |= CLOCK_BIT_CMODE;
|
|
clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405;
|
|
#endif
|
|
|
|
/* the FPGA on the CB70 has extra registers
|
|
* - it has 0x0046 in the VDK_ID FPGA register at 0x1a0, which is
|
|
* how we tell the difference between it and a CB60
|
|
*/
|
|
if (*(volatile unsigned short *) 0xffc001a0 == 0x0046)
|
|
cpu_system = __frv_mb93091_cb70;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case PSR_IMPLE_FR451:
|
|
cpu_series = "fr450";
|
|
cpu_core = "fr451";
|
|
pdm_suspend_mode = HSR0_PDM_PLL_STOP;
|
|
#ifdef CONFIG_PM
|
|
clock_bits_settable |= CLOCK_BIT_CMODE;
|
|
clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405;
|
|
#endif
|
|
switch (PSR_VERSION(psr)) {
|
|
case PSR_VERSION_FR451_MB93451:
|
|
cpu_silicon = "mb93451";
|
|
cpu_mmu = "Prot, SAT, xSAT, DAT";
|
|
cpu_system = __frv_mb93091_cb451;
|
|
clock_cmodes = clock_cmodes_fr405;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case PSR_IMPLE_FR501:
|
|
cpu_series = "fr500";
|
|
cpu_core = "fr501";
|
|
pdm_suspend_mode = HSR0_PDM_PLL_STOP;
|
|
|
|
switch (PSR_VERSION(psr)) {
|
|
case PSR_VERSION_FR501_MB93501: cpu_silicon = "mb93501"; break;
|
|
case PSR_VERSION_FR501_MB93501A: cpu_silicon = "mb93501/A"; break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case PSR_IMPLE_FR551:
|
|
cpu_series = "fr550";
|
|
cpu_core = "fr551";
|
|
pdm_suspend_mode = HSR0_PDM_PLL_RUN;
|
|
|
|
switch (PSR_VERSION(psr)) {
|
|
case PSR_VERSION_FR551_MB93555:
|
|
cpu_silicon = "mb93555";
|
|
cpu_mmu = "Prot, SAT";
|
|
cpu_system = __frv_mb93091_cb41;
|
|
clock_cmodes = clock_cmodes_fr555;
|
|
clock_doubled = 1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
printk("- Series:%s CPU:%s Silicon:%s\n",
|
|
cpu_series, cpu_core, cpu_silicon);
|
|
|
|
#ifdef CONFIG_MB93091_VDK
|
|
detect_mb93091();
|
|
#endif
|
|
|
|
#if defined(CONFIG_MB93093_PDK) && defined(CONFIG_FUJITSU_MB93493)
|
|
cpu_board2 = __frv_mb93493;
|
|
#endif
|
|
|
|
} /* end determine_cpu() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* calculate the bus clock speed
|
|
*/
|
|
void __pminit determine_clocks(int verbose)
|
|
{
|
|
const struct clock_cmode *mode, *tmode;
|
|
unsigned long clkc, psr, quot;
|
|
|
|
clkc = __get_CLKC();
|
|
psr = __get_PSR();
|
|
|
|
clock_p0_current = !!(clkc & CLKC_P0);
|
|
clock_cm_current = clkc & CLKC_CM;
|
|
clock_cmode_current = (clkc & CLKC_CMODE) >> CLKC_CMODE_s;
|
|
|
|
if (verbose)
|
|
printk("psr=%08lx hsr0=%08lx clkc=%08lx\n", psr, __get_HSR(0), clkc);
|
|
|
|
/* the CB70 has some alternative ways of setting the clock speed through switches accessed
|
|
* through the FPGA. */
|
|
if (cpu_system == __frv_mb93091_cb70) {
|
|
unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL;
|
|
|
|
if (clkswr & 0x1000)
|
|
__clkin_clock_speed_HZ = 60000000UL;
|
|
else
|
|
__clkin_clock_speed_HZ =
|
|
((clkswr >> 8) & 0xf) * 10000000 +
|
|
((clkswr >> 4) & 0xf) * 1000000 +
|
|
((clkswr ) & 0xf) * 100000;
|
|
}
|
|
/* the FR451 is currently fixed at 24MHz */
|
|
else if (cpu_system == __frv_mb93091_cb451) {
|
|
//__clkin_clock_speed_HZ = 24000000UL; // CB451-FPGA
|
|
unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL;
|
|
|
|
if (clkswr & 0x1000)
|
|
__clkin_clock_speed_HZ = 60000000UL;
|
|
else
|
|
__clkin_clock_speed_HZ =
|
|
((clkswr >> 8) & 0xf) * 10000000 +
|
|
((clkswr >> 4) & 0xf) * 1000000 +
|
|
((clkswr ) & 0xf) * 100000;
|
|
}
|
|
/* otherwise determine the clockspeed from VDK or other registers */
|
|
else {
|
|
__clkin_clock_speed_HZ = __get_CLKIN();
|
|
}
|
|
|
|
/* look up the appropriate clock relationships table entry */
|
|
mode = &undef_clock_cmode;
|
|
if (clock_cmodes) {
|
|
tmode = &clock_cmodes[(clkc & CLKC_CMODE) >> CLKC_CMODE_s];
|
|
if (tmode->xbus)
|
|
mode = tmode;
|
|
}
|
|
|
|
#define CLOCK(SRC,RATIO) ((SRC) * (((RATIO) >> 4) & 0x0f) / ((RATIO) & 0x0f))
|
|
|
|
if (clock_doubled)
|
|
__clkin_clock_speed_HZ <<= 1;
|
|
|
|
__ext_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->xbus);
|
|
__sdram_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
|
|
__dsu_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->dsu);
|
|
|
|
switch (clkc & CLKC_CM) {
|
|
case 0: /* High */
|
|
__core_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->corebus);
|
|
__core_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->core);
|
|
break;
|
|
case 1: /* Medium */
|
|
__core_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
|
|
__core_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram);
|
|
break;
|
|
case 2: /* Low; not supported */
|
|
case 3: /* UNDEF */
|
|
printk("Unsupported CLKC CM %ld\n", clkc & CLKC_CM);
|
|
panic("Bye");
|
|
}
|
|
|
|
__res_bus_clock_speed_HZ = __ext_bus_clock_speed_HZ;
|
|
if (clkc & CLKC_P0)
|
|
__res_bus_clock_speed_HZ >>= 1;
|
|
|
|
if (verbose) {
|
|
printk("CLKIN: %lu.%3.3luMHz\n",
|
|
__clkin_clock_speed_HZ / 1000000,
|
|
(__clkin_clock_speed_HZ / 1000) % 1000);
|
|
|
|
printk("CLKS:"
|
|
" ext=%luMHz res=%luMHz sdram=%luMHz cbus=%luMHz core=%luMHz dsu=%luMHz\n",
|
|
__ext_bus_clock_speed_HZ / 1000000,
|
|
__res_bus_clock_speed_HZ / 1000000,
|
|
__sdram_clock_speed_HZ / 1000000,
|
|
__core_bus_clock_speed_HZ / 1000000,
|
|
__core_clock_speed_HZ / 1000000,
|
|
__dsu_clock_speed_HZ / 1000000
|
|
);
|
|
}
|
|
|
|
/* calculate the number of __delay() loop iterations per sec (2 insn loop) */
|
|
__delay_loops_MHz = __core_clock_speed_HZ / (1000000 * 2);
|
|
|
|
/* set the serial prescaler */
|
|
__serial_clock_speed_HZ = __res_bus_clock_speed_HZ;
|
|
quot = 1;
|
|
while (__serial_clock_speed_HZ / quot / 16 / 65536 > 3000)
|
|
quot += 1;
|
|
|
|
/* double the divisor if P0 is clear, so that if/when P0 is set, it's still achievable
|
|
* - we have to be careful - dividing too much can mean we can't get 115200 baud
|
|
*/
|
|
if (__serial_clock_speed_HZ > 32000000 && !(clkc & CLKC_P0))
|
|
quot <<= 1;
|
|
|
|
__serial_clock_speed_HZ /= quot;
|
|
__frv_uart0.uartclk = __serial_clock_speed_HZ;
|
|
__frv_uart1.uartclk = __serial_clock_speed_HZ;
|
|
|
|
if (verbose)
|
|
printk(" uart=%luMHz\n", __serial_clock_speed_HZ / 1000000 * quot);
|
|
|
|
while (!(__get_UART0_LSR() & UART_LSR_TEMT))
|
|
continue;
|
|
|
|
while (!(__get_UART1_LSR() & UART_LSR_TEMT))
|
|
continue;
|
|
|
|
__set_UCPVR(quot);
|
|
__set_UCPSR(0);
|
|
} /* end determine_clocks() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* reserve some DMA consistent memory
|
|
*/
|
|
#ifdef CONFIG_RESERVE_DMA_COHERENT
|
|
static void __init reserve_dma_coherent(void)
|
|
{
|
|
unsigned long ampr;
|
|
|
|
/* find the first non-kernel memory tile and steal it */
|
|
#define __steal_AMPR(r) \
|
|
if (__get_DAMPR(r) & xAMPRx_V) { \
|
|
ampr = __get_DAMPR(r); \
|
|
__set_DAMPR(r, ampr | xAMPRx_S | xAMPRx_C); \
|
|
__set_IAMPR(r, 0); \
|
|
goto found; \
|
|
}
|
|
|
|
__steal_AMPR(1);
|
|
__steal_AMPR(2);
|
|
__steal_AMPR(3);
|
|
__steal_AMPR(4);
|
|
__steal_AMPR(5);
|
|
__steal_AMPR(6);
|
|
|
|
if (PSR_IMPLE(__get_PSR()) == PSR_IMPLE_FR551) {
|
|
__steal_AMPR(7);
|
|
__steal_AMPR(8);
|
|
__steal_AMPR(9);
|
|
__steal_AMPR(10);
|
|
__steal_AMPR(11);
|
|
__steal_AMPR(12);
|
|
__steal_AMPR(13);
|
|
__steal_AMPR(14);
|
|
}
|
|
|
|
/* unable to grant any DMA consistent memory */
|
|
printk("No DMA consistent memory reserved\n");
|
|
return;
|
|
|
|
found:
|
|
dma_coherent_mem_start = ampr & xAMPRx_PPFN;
|
|
ampr &= xAMPRx_SS;
|
|
ampr >>= 4;
|
|
ampr = 1 << (ampr - 3 + 20);
|
|
dma_coherent_mem_end = dma_coherent_mem_start + ampr;
|
|
|
|
printk("DMA consistent memory reserved %lx-%lx\n",
|
|
dma_coherent_mem_start, dma_coherent_mem_end);
|
|
|
|
} /* end reserve_dma_coherent() */
|
|
#endif
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* calibrate the delay loop
|
|
*/
|
|
void calibrate_delay(void)
|
|
{
|
|
loops_per_jiffy = __delay_loops_MHz * (1000000 / HZ);
|
|
|
|
printk("Calibrating delay loop... %lu.%02lu BogoMIPS\n",
|
|
loops_per_jiffy / (500000 / HZ),
|
|
(loops_per_jiffy / (5000 / HZ)) % 100);
|
|
|
|
} /* end calibrate_delay() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* look through the command line for some things we need to know immediately
|
|
*/
|
|
static void __init parse_cmdline_early(char *cmdline)
|
|
{
|
|
if (!cmdline)
|
|
return;
|
|
|
|
while (*cmdline) {
|
|
if (*cmdline == ' ')
|
|
cmdline++;
|
|
|
|
/* "mem=XXX[kKmM]" sets SDRAM size to <mem>, overriding the value we worked
|
|
* out from the SDRAM controller mask register
|
|
*/
|
|
if (!strncmp(cmdline, "mem=", 4)) {
|
|
unsigned long long mem_size;
|
|
|
|
mem_size = memparse(cmdline + 4, &cmdline);
|
|
memory_end = memory_start + mem_size;
|
|
}
|
|
|
|
while (*cmdline && *cmdline != ' ')
|
|
cmdline++;
|
|
}
|
|
|
|
} /* end parse_cmdline_early() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
*
|
|
*/
|
|
void __init setup_arch(char **cmdline_p)
|
|
{
|
|
#ifdef CONFIG_MMU
|
|
printk("Linux FR-V port done by Red Hat Inc <dhowells@redhat.com>\n");
|
|
#else
|
|
printk("uClinux FR-V port done by Red Hat Inc <dhowells@redhat.com>\n");
|
|
#endif
|
|
|
|
memcpy(boot_command_line, redboot_command_line, COMMAND_LINE_SIZE);
|
|
|
|
determine_cpu();
|
|
determine_clocks(1);
|
|
|
|
/* For printk-directly-beats-on-serial-hardware hack */
|
|
console_set_baud(115200);
|
|
#ifdef CONFIG_GDBSTUB
|
|
gdbstub_set_baud(115200);
|
|
#endif
|
|
|
|
#ifdef CONFIG_RESERVE_DMA_COHERENT
|
|
reserve_dma_coherent();
|
|
#endif
|
|
dump_memory_map();
|
|
|
|
#ifdef CONFIG_MB93090_MB00
|
|
if (mb93090_mb00_detected)
|
|
mb93090_display();
|
|
#endif
|
|
|
|
/* register those serial ports that are available */
|
|
#ifdef CONFIG_FRV_ONCPU_SERIAL
|
|
#ifndef CONFIG_GDBSTUB_UART0
|
|
__reg(UART0_BASE + UART_IER * 8) = 0;
|
|
early_serial_setup(&__frv_uart0);
|
|
#endif
|
|
#ifndef CONFIG_GDBSTUB_UART1
|
|
__reg(UART1_BASE + UART_IER * 8) = 0;
|
|
early_serial_setup(&__frv_uart1);
|
|
#endif
|
|
#endif
|
|
|
|
/* deal with the command line - RedBoot may have passed one to the kernel */
|
|
memcpy(command_line, boot_command_line, sizeof(command_line));
|
|
*cmdline_p = &command_line[0];
|
|
parse_cmdline_early(command_line);
|
|
|
|
/* set up the memory description
|
|
* - by now the stack is part of the init task */
|
|
printk("Memory %08lx-%08lx\n", memory_start, memory_end);
|
|
|
|
BUG_ON(memory_start == memory_end);
|
|
|
|
init_mm.start_code = (unsigned long) _stext;
|
|
init_mm.end_code = (unsigned long) _etext;
|
|
init_mm.end_data = (unsigned long) _edata;
|
|
#if 0 /* DAVIDM - don't set brk just incase someone decides to use it */
|
|
init_mm.brk = (unsigned long) &_end;
|
|
#else
|
|
init_mm.brk = (unsigned long) 0;
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
printk("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n",
|
|
_stext, _etext, _sdata, _edata, __bss_start, __bss_stop);
|
|
#endif
|
|
|
|
#ifdef CONFIG_VT
|
|
#if defined(CONFIG_VGA_CONSOLE)
|
|
conswitchp = &vga_con;
|
|
#elif defined(CONFIG_DUMMY_CONSOLE)
|
|
conswitchp = &dummy_con;
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef CONFIG_MMU
|
|
setup_linux_memory();
|
|
#else
|
|
setup_uclinux_memory();
|
|
#endif
|
|
|
|
/* get kmalloc into gear */
|
|
paging_init();
|
|
|
|
/* init DMA */
|
|
frv_dma_init();
|
|
#ifdef DEBUG
|
|
printk("Done setup_arch\n");
|
|
#endif
|
|
|
|
/* start the decrement timer running */
|
|
// asm volatile("movgs %0,timerd" :: "r"(10000000));
|
|
// __set_HSR(0, __get_HSR(0) | HSR0_ETMD);
|
|
|
|
} /* end setup_arch() */
|
|
|
|
#if 0
|
|
/*****************************************************************************/
|
|
/*
|
|
*
|
|
*/
|
|
static int setup_arch_serial(void)
|
|
{
|
|
/* register those serial ports that are available */
|
|
#ifndef CONFIG_GDBSTUB_UART0
|
|
early_serial_setup(&__frv_uart0);
|
|
#endif
|
|
#ifndef CONFIG_GDBSTUB_UART1
|
|
early_serial_setup(&__frv_uart1);
|
|
#endif
|
|
|
|
return 0;
|
|
} /* end setup_arch_serial() */
|
|
|
|
late_initcall(setup_arch_serial);
|
|
#endif
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* set up the memory map for normal MMU linux
|
|
*/
|
|
#ifdef CONFIG_MMU
|
|
static void __init setup_linux_memory(void)
|
|
{
|
|
unsigned long bootmap_size, low_top_pfn, kstart, kend, high_mem;
|
|
unsigned long physpages;
|
|
|
|
kstart = (unsigned long) &__kernel_image_start - PAGE_OFFSET;
|
|
kend = (unsigned long) &__kernel_image_end - PAGE_OFFSET;
|
|
|
|
kstart = kstart & PAGE_MASK;
|
|
kend = (kend + PAGE_SIZE - 1) & PAGE_MASK;
|
|
|
|
/* give all the memory to the bootmap allocator, tell it to put the
|
|
* boot mem_map immediately following the kernel image
|
|
*/
|
|
bootmap_size = init_bootmem_node(NODE_DATA(0),
|
|
kend >> PAGE_SHIFT, /* map addr */
|
|
memory_start >> PAGE_SHIFT, /* start of RAM */
|
|
memory_end >> PAGE_SHIFT /* end of RAM */
|
|
);
|
|
|
|
/* pass the memory that the kernel can immediately use over to the bootmem allocator */
|
|
max_mapnr = physpages = (memory_end - memory_start) >> PAGE_SHIFT;
|
|
low_top_pfn = (KERNEL_LOWMEM_END - KERNEL_LOWMEM_START) >> PAGE_SHIFT;
|
|
high_mem = 0;
|
|
|
|
if (physpages > low_top_pfn) {
|
|
#ifdef CONFIG_HIGHMEM
|
|
high_mem = physpages - low_top_pfn;
|
|
#else
|
|
max_mapnr = physpages = low_top_pfn;
|
|
#endif
|
|
}
|
|
else {
|
|
low_top_pfn = physpages;
|
|
}
|
|
|
|
min_low_pfn = memory_start >> PAGE_SHIFT;
|
|
max_low_pfn = low_top_pfn;
|
|
max_pfn = memory_end >> PAGE_SHIFT;
|
|
|
|
num_mappedpages = low_top_pfn;
|
|
|
|
printk(KERN_NOTICE "%ldMB LOWMEM available.\n", low_top_pfn >> (20 - PAGE_SHIFT));
|
|
|
|
free_bootmem(memory_start, low_top_pfn << PAGE_SHIFT);
|
|
|
|
#ifdef CONFIG_HIGHMEM
|
|
if (high_mem)
|
|
printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", high_mem >> (20 - PAGE_SHIFT));
|
|
#endif
|
|
|
|
/* take back the memory occupied by the kernel image and the bootmem alloc map */
|
|
reserve_bootmem(kstart, kend - kstart + bootmap_size,
|
|
BOOTMEM_DEFAULT);
|
|
|
|
/* reserve the memory occupied by the initial ramdisk */
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
if (LOADER_TYPE && INITRD_START) {
|
|
if (INITRD_START + INITRD_SIZE <= (low_top_pfn << PAGE_SHIFT)) {
|
|
reserve_bootmem(INITRD_START, INITRD_SIZE,
|
|
BOOTMEM_DEFAULT);
|
|
initrd_start = INITRD_START + PAGE_OFFSET;
|
|
initrd_end = initrd_start + INITRD_SIZE;
|
|
}
|
|
else {
|
|
printk(KERN_ERR
|
|
"initrd extends beyond end of memory (0x%08lx > 0x%08lx)\n"
|
|
"disabling initrd\n",
|
|
INITRD_START + INITRD_SIZE,
|
|
low_top_pfn << PAGE_SHIFT);
|
|
initrd_start = 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
} /* end setup_linux_memory() */
|
|
#endif
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* set up the memory map for uClinux
|
|
*/
|
|
#ifndef CONFIG_MMU
|
|
static void __init setup_uclinux_memory(void)
|
|
{
|
|
#ifdef CONFIG_PROTECT_KERNEL
|
|
unsigned long dampr;
|
|
#endif
|
|
unsigned long kend;
|
|
int bootmap_size;
|
|
|
|
kend = (unsigned long) &__kernel_image_end;
|
|
kend = (kend + PAGE_SIZE - 1) & PAGE_MASK;
|
|
|
|
/* give all the memory to the bootmap allocator, tell it to put the
|
|
* boot mem_map immediately following the kernel image
|
|
*/
|
|
bootmap_size = init_bootmem_node(NODE_DATA(0),
|
|
kend >> PAGE_SHIFT, /* map addr */
|
|
memory_start >> PAGE_SHIFT, /* start of RAM */
|
|
memory_end >> PAGE_SHIFT /* end of RAM */
|
|
);
|
|
|
|
/* free all the usable memory */
|
|
free_bootmem(memory_start, memory_end - memory_start);
|
|
|
|
high_memory = (void *) (memory_end & PAGE_MASK);
|
|
max_mapnr = ((unsigned long) high_memory - PAGE_OFFSET) >> PAGE_SHIFT;
|
|
|
|
min_low_pfn = memory_start >> PAGE_SHIFT;
|
|
max_low_pfn = memory_end >> PAGE_SHIFT;
|
|
max_pfn = max_low_pfn;
|
|
|
|
/* now take back the bits the core kernel is occupying */
|
|
#ifndef CONFIG_PROTECT_KERNEL
|
|
reserve_bootmem(kend, bootmap_size, BOOTMEM_DEFAULT);
|
|
reserve_bootmem((unsigned long) &__kernel_image_start,
|
|
kend - (unsigned long) &__kernel_image_start,
|
|
BOOTMEM_DEFAULT);
|
|
|
|
#else
|
|
dampr = __get_DAMPR(0);
|
|
dampr &= xAMPRx_SS;
|
|
dampr = (dampr >> 4) + 17;
|
|
dampr = 1 << dampr;
|
|
|
|
reserve_bootmem(__get_DAMPR(0) & xAMPRx_PPFN, dampr, BOOTMEM_DEFAULT);
|
|
#endif
|
|
|
|
/* reserve some memory to do uncached DMA through if requested */
|
|
#ifdef CONFIG_RESERVE_DMA_COHERENT
|
|
if (dma_coherent_mem_start)
|
|
reserve_bootmem(dma_coherent_mem_start,
|
|
dma_coherent_mem_end - dma_coherent_mem_start,
|
|
BOOTMEM_DEFAULT);
|
|
#endif
|
|
|
|
} /* end setup_uclinux_memory() */
|
|
#endif
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* get CPU information for use by procfs
|
|
*/
|
|
static int show_cpuinfo(struct seq_file *m, void *v)
|
|
{
|
|
const char *gr, *fr, *fm, *fp, *cm, *nem, *ble;
|
|
#ifdef CONFIG_PM
|
|
const char *sep;
|
|
#endif
|
|
|
|
gr = cpu_hsr0_all & HSR0_GRHE ? "gr0-63" : "gr0-31";
|
|
fr = cpu_hsr0_all & HSR0_FRHE ? "fr0-63" : "fr0-31";
|
|
fm = cpu_psr_all & PSR_EM ? ", Media" : "";
|
|
fp = cpu_psr_all & PSR_EF ? ", FPU" : "";
|
|
cm = cpu_psr_all & PSR_CM ? ", CCCR" : "";
|
|
nem = cpu_psr_all & PSR_NEM ? ", NE" : "";
|
|
ble = cpu_psr_all & PSR_BE ? "BE" : "LE";
|
|
|
|
seq_printf(m,
|
|
"CPU-Series:\t%s\n"
|
|
"CPU-Core:\t%s, %s, %s%s%s\n"
|
|
"CPU:\t\t%s\n"
|
|
"MMU:\t\t%s\n"
|
|
"FP-Media:\t%s%s%s\n"
|
|
"System:\t\t%s",
|
|
cpu_series,
|
|
cpu_core, gr, ble, cm, nem,
|
|
cpu_silicon,
|
|
cpu_mmu,
|
|
fr, fm, fp,
|
|
cpu_system);
|
|
|
|
if (cpu_board1)
|
|
seq_printf(m, ", %s", cpu_board1);
|
|
|
|
if (cpu_board2)
|
|
seq_printf(m, ", %s", cpu_board2);
|
|
|
|
seq_printf(m, "\n");
|
|
|
|
#ifdef CONFIG_PM
|
|
seq_printf(m, "PM-Controls:");
|
|
sep = "\t";
|
|
|
|
if (clock_bits_settable & CLOCK_BIT_CMODE) {
|
|
seq_printf(m, "%scmode=0x%04hx", sep, clock_cmodes_permitted);
|
|
sep = ", ";
|
|
}
|
|
|
|
if (clock_bits_settable & CLOCK_BIT_CM) {
|
|
seq_printf(m, "%scm=0x%lx", sep, clock_bits_settable & CLOCK_BIT_CM);
|
|
sep = ", ";
|
|
}
|
|
|
|
if (clock_bits_settable & CLOCK_BIT_P0) {
|
|
seq_printf(m, "%sp0=0x3", sep);
|
|
sep = ", ";
|
|
}
|
|
|
|
seq_printf(m, "%ssuspend=0x22\n", sep);
|
|
#endif
|
|
|
|
seq_printf(m,
|
|
"PM-Status:\tcmode=%d, cm=%d, p0=%d\n",
|
|
clock_cmode_current, clock_cm_current, clock_p0_current);
|
|
|
|
#define print_clk(TAG, VAR) \
|
|
seq_printf(m, "Clock-" TAG ":\t%lu.%2.2lu MHz\n", VAR / 1000000, (VAR / 10000) % 100)
|
|
|
|
print_clk("In", __clkin_clock_speed_HZ);
|
|
print_clk("Core", __core_clock_speed_HZ);
|
|
print_clk("SDRAM", __sdram_clock_speed_HZ);
|
|
print_clk("CBus", __core_bus_clock_speed_HZ);
|
|
print_clk("Res", __res_bus_clock_speed_HZ);
|
|
print_clk("Ext", __ext_bus_clock_speed_HZ);
|
|
print_clk("DSU", __dsu_clock_speed_HZ);
|
|
|
|
seq_printf(m,
|
|
"BogoMips:\t%lu.%02lu\n",
|
|
(loops_per_jiffy * HZ) / 500000, ((loops_per_jiffy * HZ) / 5000) % 100);
|
|
|
|
return 0;
|
|
} /* end show_cpuinfo() */
|
|
|
|
static void *c_start(struct seq_file *m, loff_t *pos)
|
|
{
|
|
return *pos < NR_CPUS ? (void *) 0x12345678 : NULL;
|
|
}
|
|
|
|
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
|
|
{
|
|
++*pos;
|
|
return c_start(m, pos);
|
|
}
|
|
|
|
static void c_stop(struct seq_file *m, void *v)
|
|
{
|
|
}
|
|
|
|
const struct seq_operations cpuinfo_op = {
|
|
.start = c_start,
|
|
.next = c_next,
|
|
.stop = c_stop,
|
|
.show = show_cpuinfo,
|
|
};
|
|
|
|
void arch_gettod(int *year, int *mon, int *day, int *hour,
|
|
int *min, int *sec)
|
|
{
|
|
*year = *mon = *day = *hour = *min = *sec = 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
*
|
|
*/
|
|
#ifdef CONFIG_MB93090_MB00
|
|
static void __init mb93090_sendlcdcmd(uint32_t cmd)
|
|
{
|
|
unsigned long base = __addr_LCD();
|
|
int loop;
|
|
|
|
/* request reading of the busy flag */
|
|
__set_LCD(base, LCD_CMD_READ_BUSY);
|
|
__set_LCD(base, LCD_CMD_READ_BUSY & ~LCD_E);
|
|
|
|
/* wait for the busy flag to become clear */
|
|
for (loop = 10000; loop > 0; loop--)
|
|
if (!(__get_LCD(base) & 0x80))
|
|
break;
|
|
|
|
/* send the command */
|
|
__set_LCD(base, cmd);
|
|
__set_LCD(base, cmd & ~LCD_E);
|
|
|
|
} /* end mb93090_sendlcdcmd() */
|
|
|
|
/*****************************************************************************/
|
|
/*
|
|
* write to the MB93090 LEDs and LCD
|
|
*/
|
|
static void __init mb93090_display(void)
|
|
{
|
|
const char *p;
|
|
|
|
__set_LEDS(0);
|
|
|
|
/* set up the LCD */
|
|
mb93090_sendlcdcmd(LCD_CMD_CLEAR);
|
|
mb93090_sendlcdcmd(LCD_CMD_FUNCSET(1,1,0));
|
|
mb93090_sendlcdcmd(LCD_CMD_ON(0,0));
|
|
mb93090_sendlcdcmd(LCD_CMD_HOME);
|
|
|
|
mb93090_sendlcdcmd(LCD_CMD_SET_DD_ADDR(0));
|
|
for (p = mb93090_banner; *p; p++)
|
|
mb93090_sendlcdcmd(LCD_DATA_WRITE(*p));
|
|
|
|
mb93090_sendlcdcmd(LCD_CMD_SET_DD_ADDR(64));
|
|
for (p = mb93090_version; *p; p++)
|
|
mb93090_sendlcdcmd(LCD_DATA_WRITE(*p));
|
|
|
|
} /* end mb93090_display() */
|
|
|
|
#endif // CONFIG_MB93090_MB00
|