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ARMv8/PSCI: Fixup the device tree for PSCI 

Set the enable-method in the cpu node to PSCI, and create device
node for PSCI, when PSCI was enabled.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
This commit is contained in:
Hou Zhiqiang 2016-06-28 20:18:16 +08:00 committed by York Sun
parent 032d5bb4ae
commit 45684ae37b
7 changed files with 159 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
arch/arm/cpu/armv7/virt-dt.c
View File

@ -26,69 +26,6 @@
#include <asm/armv7.h>
#include <asm/psci.h>
static int fdt_psci(void *fdt)
{
#ifdef CONFIG_ARMV7_PSCI
int nodeoff;
int tmp;
nodeoff = fdt_path_offset(fdt, "/cpus");
if (nodeoff < 0) {
printf("couldn't find /cpus\n");
return nodeoff;
}
/* add 'enable-method = "psci"' to each cpu node */
for (tmp = fdt_first_subnode(fdt, nodeoff);
tmp >= 0;
tmp = fdt_next_subnode(fdt, tmp)) {
const struct fdt_property *prop;
int len;
prop = fdt_get_property(fdt, tmp, "device_type", &len);
if (!prop)
continue;
if (len < 4)
continue;
if (strcmp(prop->data, "cpu"))
continue;
fdt_setprop_string(fdt, tmp, "enable-method", "psci");
}
nodeoff = fdt_path_offset(fdt, "/psci");
if (nodeoff < 0) {
nodeoff = fdt_path_offset(fdt, "/");
if (nodeoff < 0)
return nodeoff;
nodeoff = fdt_add_subnode(fdt, nodeoff, "psci");
if (nodeoff < 0)
return nodeoff;
}
tmp = fdt_setprop_string(fdt, nodeoff, "compatible", "arm,psci");
if (tmp)
return tmp;
tmp = fdt_setprop_string(fdt, nodeoff, "method", "smc");
if (tmp)
return tmp;
tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_suspend", ARM_PSCI_FN_CPU_SUSPEND);
if (tmp)
return tmp;
tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_off", ARM_PSCI_FN_CPU_OFF);
if (tmp)
return tmp;
tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_on", ARM_PSCI_FN_CPU_ON);
if (tmp)
return tmp;
tmp = fdt_setprop_u32(fdt, nodeoff, "migrate", ARM_PSCI_FN_MIGRATE);
if (tmp)
return tmp;
#endif
return 0;
}
int armv7_apply_memory_carveout(u64 *start, u64 *size)
{
#ifdef CONFIG_ARMV7_SECURE_RESERVE_SIZE

1
arch/arm/cpu/armv8/Makefile
View File

@ -15,6 +15,7 @@ obj-y += cache.o
obj-y += tlb.o
obj-y += transition.o
obj-y += fwcall.o
obj-y += cpu-dt.o
obj-$(CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT) += sec_firmware.o sec_firmware_asm.o
obj-$(CONFIG_FSL_LAYERSCAPE) += fsl-layerscape/

31
arch/arm/cpu/armv8/cpu-dt.c Normal file
View File

@ -0,0 +1,31 @@
/*
* Copyright 2016 NXP Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/psci.h>
#ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
#include <asm/armv8/sec_firmware.h>
#endif
int psci_update_dt(void *fdt)
{
#ifdef CONFIG_MP
#if defined(CONFIG_ARMV8_PSCI)
#ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
/*
* If the PSCI in SEC Firmware didn't work, avoid to update the
* device node of PSCI. But still return 0 instead of an error
* number to support detecting PSCI dynamically and then switching
* the SMP boot method between PSCI and spin-table.
*/
if (sec_firmware_support_psci_version() == 0xffffffff)
return 0;
#endif
fdt_psci(fdt);
#endif
#endif
return 0;
}

1
arch/arm/include/asm/psci.h
View File

@ -57,6 +57,7 @@ void psci_cpu_off_common(void);
int psci_update_dt(void *fdt);
void psci_board_init(void);
int fdt_psci(void *fdt);
#endif /* ! __ASSEMBLY__ */
#endif /* __ARM_PSCI_H__ */

2
arch/arm/lib/Makefile
View File

@ -55,6 +55,8 @@ ifndef CONFIG_ARM64
obj-y += cache-cp15.o
endif
obj-y += psci-dt.o
obj-$(CONFIG_DEBUG_LL) += debug.o
# For EABI conformant tool chains, provide eabi_compat()

2
arch/arm/lib/bootm-fdt.c
View File

@ -45,7 +45,7 @@ int arch_fixup_fdt(void *blob)
if (ret)
return ret;
#ifdef CONFIG_ARMV7_NONSEC
#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV8_PSCI)
ret = psci_update_dt(blob);
if (ret)
return ret;

123
arch/arm/lib/psci-dt.c Normal file
View File

@ -0,0 +1,123 @@
/*
* Copyright 2016 NXP Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <libfdt.h>
#include <fdt_support.h>
#include <linux/sizes.h>
#include <linux/kernel.h>
#include <asm/psci.h>
#ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
#include <asm/armv8/sec_firmware.h>
#endif
int fdt_psci(void *fdt)
{
#if defined(CONFIG_ARMV8_PSCI) || defined(CONFIG_ARMV7_PSCI)
int nodeoff;
unsigned int psci_ver = 0;
char *psci_compt;
int tmp;
nodeoff = fdt_path_offset(fdt, "/cpus");
if (nodeoff < 0) {
printf("couldn't find /cpus\n");
return nodeoff;
}
/* add 'enable-method = "psci"' to each cpu node */
for (tmp = fdt_first_subnode(fdt, nodeoff);
tmp >= 0;
tmp = fdt_next_subnode(fdt, tmp)) {
const struct fdt_property *prop;
int len;
prop = fdt_get_property(fdt, tmp, "device_type", &len);
if (!prop)
continue;
if (len < 4)
continue;
if (strcmp(prop->data, "cpu"))
continue;
/*
* Not checking rv here, our approach is to skip over errors in
* individual cpu nodes, hopefully some of the nodes are
* processed correctly and those will boot
*/
fdt_setprop_string(fdt, tmp, "enable-method", "psci");
}
/*
* The PSCI node might be called "/psci" or might be called something
* else but contain either of the compatible strings
* "arm,psci"/"arm,psci-0.2"
*/
nodeoff = fdt_path_offset(fdt, "/psci");
if (nodeoff >= 0)
goto init_psci_node;
nodeoff = fdt_node_offset_by_compatible(fdt, -1, "arm,psci");
if (nodeoff >= 0)
goto init_psci_node;
nodeoff = fdt_node_offset_by_compatible(fdt, -1, "arm,psci-0.2");
if (nodeoff >= 0)
goto init_psci_node;
nodeoff = fdt_node_offset_by_compatible(fdt, -1, "arm,psci-1.0");
if (nodeoff >= 0)
goto init_psci_node;
nodeoff = fdt_path_offset(fdt, "/");
if (nodeoff < 0)
return nodeoff;
nodeoff = fdt_add_subnode(fdt, nodeoff, "psci");
if (nodeoff < 0)
return nodeoff;
init_psci_node:
#ifdef CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT
psci_ver = sec_firmware_support_psci_version();
#endif
switch (psci_ver) {
case 0x00010000:
psci_compt = "arm,psci-1.0";
break;
case 0x00000002:
psci_compt = "arm,psci-0.2";
break;
default:
psci_compt = "arm,psci";
break;
}
tmp = fdt_setprop_string(fdt, nodeoff, "compatible", psci_compt);
if (tmp)
return tmp;
tmp = fdt_setprop_string(fdt, nodeoff, "method", "smc");
if (tmp)
return tmp;
#ifdef CONFIG_ARMV7_PSCI
tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_suspend",
ARM_PSCI_FN_CPU_SUSPEND);
if (tmp)
return tmp;
tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_off", ARM_PSCI_FN_CPU_OFF);
if (tmp)
return tmp;
tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_on", ARM_PSCI_FN_CPU_ON);
if (tmp)
return tmp;
tmp = fdt_setprop_u32(fdt, nodeoff, "migrate", ARM_PSCI_FN_MIGRATE);
if (tmp)
return tmp;
#endif
#endif
return 0;
}