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sh: Add support SH2/SH2A which is CPU of Renesas Technology 

Add support SH2/SH2A basic function.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
This commit is contained in:
Nobuhiro Iwamatsu 2008-08-31 22:48:33 +09:00
parent 0d53a47dc0
commit 6ad43d0dd8
11 changed files with 593 additions and 1 deletions
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49
cpu/sh2/Makefile Normal file
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#
# (C) Copyright 2000-2006
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
#
# Copyright (C) 2007,2008 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
# Copyright (C) 2008 Renesas Solutions Corp.
#
# See file CREDITS for list of people who contributed to this
# project.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#
include $(TOPDIR)/config.mk
LIB = $(obj)lib$(CPU).a
START = start.o
OBJS = cpu.o interrupts.o watchdog.o time.o # cache.o
all: .depend $(START) $(LIB)
$(LIB): $(OBJS)
$(AR) $(ARFLAGS) $@ $(OBJS)
#########################################################################
.depend: Makefile $(START:.o=.S) $(OBJS:.o=.c)
$(CC) -M $(CFLAGS) $(START:.o=.S) $(OBJS:.o=.c) > $@
# defines $(obj).depend target
include $(SRCTREE)/rules.mk
sinclude $(obj).depend
#########################################################################

112
cpu/sh2/cache.c Normal file
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/*
* (C) Copyright 2007
* Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
*
* Copyright (C) 2007, 2008 Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
* Copyright (C) 2008 Renesas Solutions Corp.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <command.h>
#include <asm/processor.h>
#include <asm/io.h>
/*
* Jump to P2 area.
* When handling TLB or caches, we need to do it from P2 area.
*/
#define jump_to_P2() \
do { \
unsigned long __dummy; \
__asm__ __volatile__( \
"mov.l 1f, %0\n\t" \
"or %1, %0\n\t" \
"jmp @%0\n\t" \
" nop\n\t" \
".balign 4\n" \
"1: .long 2f\n" \
"2:" \
: "=&r" (__dummy) \
: "r" (0x20000000)); \
} while (0)
/*
* Back to P1 area.
*/
#define back_to_P1() \
do { \
unsigned long __dummy; \
__asm__ __volatile__( \
"nop;nop;nop;nop;nop;nop;nop\n\t" \
"mov.l 1f, %0\n\t" \
"jmp @%0\n\t" \
" nop\n\t" \
".balign 4\n" \
"1: .long 2f\n" \
"2:" \
: "=&r" (__dummy)); \
} while (0)
#define CACHE_VALID 1
#define CACHE_UPDATED 2
static inline void cache_wback_all(void)
{
unsigned long addr, data, i, j;
jump_to_P2();
for (i = 0; i < CACHE_OC_NUM_ENTRIES; i++) {
for (j = 0; j < CACHE_OC_NUM_WAYS; j++) {
addr = CACHE_OC_ADDRESS_ARRAY
| (j << CACHE_OC_WAY_SHIFT)
| (i << CACHE_OC_ENTRY_SHIFT);
data = inl(addr);
if (data & CACHE_UPDATED) {
data &= ~CACHE_UPDATED;
outl(data, addr);
}
}
}
back_to_P1();
}
#define CACHE_ENABLE 0
#define CACHE_DISABLE 1
int cache_control(unsigned int cmd)
{
unsigned long ccr;
jump_to_P2();
ccr = inl(CCR);
if (ccr & CCR_CACHE_ENABLE)
cache_wback_all();
if (cmd == CACHE_DISABLE)
outl(CCR_CACHE_STOP, CCR);
else
outl(CCR_CACHE_INIT, CCR);
back_to_P1();
return 0;
}

26
cpu/sh2/config.mk Normal file
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#
# (C) Copyright 2007-2008
# Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
#
# See file CREDITS for list of people who contributed to this
# project.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#
#
PLATFORM_CPPFLAGS += -m3e -mb
PLATFORM_RELFLAGS += -ffixed-r13
PLATFORM_LDFLAGS += -EB

98
cpu/sh2/cpu.c Normal file
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/*
* Copyright (C) 2007,2008 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
* Copyright (C) 2008 Renesas Solutions Corp.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <command.h>
#include <asm/processor.h>
#include <asm/io.h>
#define STBCR4 0xFFFE040C
#define cmt_clock_enable() do {\
writeb(readb(STBCR4) & ~0x04, STBCR4);\
} while (0)
#define scif0_enable() do {\
writeb(readb(STBCR4) & ~0x80, STBCR4);\
} while (0)
int checkcpu(void)
{
#if defined(CONFIG_SH2A)
puts("CPU: SH2A\n");
#else
puts("CPU: SH2\n");
#endif
return 0;
}
int cpu_init(void)
{
/* SCIF enable */
scif0_enable();
/* CMT clock enable */
cmt_clock_enable() ;
return 0;
}
int cleanup_before_linux(void)
{
disable_interrupts();
return 0;
}
int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
disable_interrupts();
reset_cpu(0);
return 0;
}
void flush_cache(unsigned long addr, unsigned long size)
{
}
void icache_enable(void)
{
}
void icache_disable(void)
{
}
int icache_status(void)
{
return 0;
}
void dcache_enable(void)
{
}
void dcache_disable(void)
{
}
int dcache_status(void)
{
return 0;
}

39
cpu/sh2/interrupts.c Normal file
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@ -0,0 +1,39 @@
/*
* Copyright 2007,2008 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
* Copyright (C) 2008 Renesas Solutions Corp.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
int interrupt_init(void)
{
return 0;
}
void enable_interrupts(void)
{
}
int disable_interrupts(void)
{
return 0;
}

78
cpu/sh2/start.S Normal file
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@ -0,0 +1,78 @@
/*
* Copyright (C) 2007,2008 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
* Copyright (C) 2008 Renesas Solutions Corp.
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <config.h>
#include <version.h>
.text
.align 2
.global _start
_start:
.long 0x00000010 /* Ppower ON reset PC*/
.long 0x00000000
.long 0x00000010 /* Manual reset PC */
.long 0x00000000
_init:
mov.l ._lowlevel_init, r0
100: bsrf r0
nop
bsr 1f
nop
1: sts pr, r5
mov.l ._reloc_dst, r4
add #(_start-1b), r5
mov.l ._reloc_dst_end, r6
2: mov.l @r5+, r1
mov.l r1, @r4
add #4, r4
cmp/hs r6, r4
bf 2b
mov.l ._bss_start, r4
mov.l ._bss_end, r5
mov #0, r1
3: mov.l r1, @r4 /* bss clear */
add #4, r4
cmp/hs r5, r4
bf 3b
mov.l ._gd_init, r13 /* global data */
mov.l ._stack_init, r15 /* stack */
mov.l ._sh_generic_init, r0
jsr @r0
nop
loop:
bra loop
.align 2
._lowlevel_init: .long (lowlevel_init - (100b + 4))
._reloc_dst: .long reloc_dst
._reloc_dst_end: .long reloc_dst_end
._bss_start: .long bss_start
._bss_end: .long bss_end
._gd_init: .long (_start - CFG_GBL_DATA_SIZE)
._stack_init: .long (_start - CFG_GBL_DATA_SIZE - CFG_MALLOC_LEN - 16)
._sh_generic_init: .long sh_generic_init

111
cpu/sh2/time.c Normal file
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@ -0,0 +1,111 @@
/*
* Copyright (C) 2007,2008 Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
* Copyright (C) 2008 Renesas Solutions Corp.
*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/io.h>
#include <asm/processor.h>
#define CMT_CMCSR_INIT 0x0001 /* PCLK/32 */
#define CMT_CMCSR_CALIB 0x0000
#define CMT_MAX_COUNTER (0xFFFFFFFF)
#define CMT_TIMER_RESET (0xFFFF)
static vu_long cmt0_timer;
static void cmt_timer_start(unsigned int timer)
{
writew(readw(CMSTR) | 0x01, CMSTR);
}
static void cmt_timer_stop(unsigned int timer)
{
writew(readw(CMSTR) & ~0x01, CMSTR);
}
int timer_init(void)
{
cmt0_timer = 0;
/* Divide clock by 32 */
readw(CMCSR_0);
writew(CMT_CMCSR_INIT, CMCSR_0);
/* User Device 0 only */
cmt_timer_stop(0);
set_timer(CMT_TIMER_RESET);
cmt_timer_start(0);
return 0;
}
unsigned long long get_ticks(void)
{
return cmt0_timer;
}
static vu_long cmcnt;
ulong get_timer(ulong base)
{
ulong data = readw(CMCNT_0);
if (data >= cmcnt)
cmcnt = data - cmcnt;
else
cmcnt = (CMT_TIMER_RESET - cmcnt) + data;
if ((cmt0_timer + cmcnt) > CMT_MAX_COUNTER)
cmt0_timer = ((cmt0_timer + cmcnt) - CMT_MAX_COUNTER);
else
cmt0_timer += cmcnt;
cmcnt = data;
return cmt0_timer - base;
}
void set_timer(ulong t)
{
writew((u16) t, CMCOR_0);
}
void reset_timer(void)
{
cmt_timer_stop(0);
set_timer(CMT_TIMER_RESET);
cmt0_timer = 0;
cmt_timer_start(0);
}
void udelay(unsigned long usec)
{
unsigned int start = get_timer(0);
while (get_timer((ulong) start) < (usec * (CFG_HZ / 1000000)))
continue;
}
unsigned long get_tbclk(void)
{
return CFG_HZ;
}

33
cpu/sh2/watchdog.c Normal file
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/*
* Copyright (C) 2008 Nobuhiro Iwamatsu <iwamatsu.nobuhoro@renesas.com>
* Copyright (C) 2008 Renesas Solutions Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/processor.h>
int watchdog_init(void)
{
return 0;
}
void reset_cpu(unsigned long ignored)
{
while (1)
;
}

3
examples/Makefile
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@ -67,6 +67,9 @@ endif
ifeq ($(ARCH),sh) ifeq ($(ARCH),sh)
LOAD_ADDR = 0x8C000000 LOAD_ADDR = 0x8C000000
ifeq ($(CPU),sh2)
BIG_ENDIAN=y
endif
endif endif
ifeq ($(ARCH),sparc) ifeq ($(ARCH),sparc)

40
include/asm-sh/cpu_sh2.h Normal file
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/*
* Copyright (C) 2007,2008 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
* Copyright (C) 2008 Renesas Solutions Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef _ASM_CPU_SH2_H_
#define _ASM_CPU_SH2_H_
/* cache control */
#define CCR_CACHE_STOP 0x00000008
#define CCR_CACHE_ENABLE 0x00000005
#define CCR_CACHE_ICI 0x00000008
#define CACHE_OC_ADDRESS_ARRAY 0xf0000000
#define CACHE_OC_WAY_SHIFT 13
#define CACHE_OC_NUM_ENTRIES 256
#define CACHE_OC_ENTRY_SHIFT 4
#if defined(CONFIG_CPU_SH7203)
# include <asm/cpu_sh7203.h>
#else
# error "Unknown SH2 variant"
#endif
#endif /* _ASM_CPU_SH2_H_ */

5
include/asm-sh/processor.h
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@ -1,6 +1,9 @@
#ifndef _ASM_SH_PROCESSOR_H_ #ifndef _ASM_SH_PROCESSOR_H_
#define _ASM_SH_PROCESSOR_H_ #define _ASM_SH_PROCESSOR_H_
#if defined CONFIG_SH3 #if defined(CONFIG_SH2) || \
defined (CONFIG_SH2A)
# include <asm/cpu_sh2.h>
#elif defined (CONFIG_SH3)
# include <asm/cpu_sh3.h> # include <asm/cpu_sh3.h>
#elif defined (CONFIG_SH4) || \ #elif defined (CONFIG_SH4) || \
defined (CONFIG_SH4A) defined (CONFIG_SH4A)