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ARM: mvebu: add function to set the resume boot address for Armada 375

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In order to boot the secondary CPUs on Armada 375, we need to set the
boot address of these CPUs, through a register part of the System
Controller (this deviates from the Armada XP design, where the boot
address was defined using a register part of the PMSU unit).

Therefore, this commit adds a new helper function in the System
Controller driver to set the secondary CPU boot address.

Moreover, it moves the System Controller initialization as an
early_initcall(), since arch_initcall() is too late for an SMP-related
initialization.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Link: https://lkml.kernel.org/r/1397483648-26611-7-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1397483648-26611-7-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Gregory CLEMENT 2014-04-14 15:54:03 +02:00 committed by Jason Cooper
parent 5194efc5c6
commit 00504be42a
2 changed files with 15 additions and 1 deletions
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1
arch/arm/mach-mvebu/common.h
View File

@ -20,6 +20,7 @@
void mvebu_restart(enum reboot_mode mode, const char *cmd);
int mvebu_cpu_reset_deassert(int cpu);
void mvebu_pmsu_set_cpu_boot_addr(int hw_cpu, void *boot_addr);
void mvebu_system_controller_set_cpu_boot_addr(void *boot_addr);
void armada_xp_cpu_die(unsigned int cpu);

15
arch/arm/mach-mvebu/system-controller.c
View File

@ -37,6 +37,8 @@ struct mvebu_system_controller {
u32 rstoutn_mask_reset_out_en;
u32 system_soft_reset;
u32 resume_boot_addr;
};
static struct mvebu_system_controller *mvebu_sc;
@ -52,6 +54,7 @@ static const struct mvebu_system_controller armada_375_system_controller = {
.system_soft_reset_offset = 0x58,
.rstoutn_mask_reset_out_en = 0x1,
.system_soft_reset = 0x1,
.resume_boot_addr = 0xd4,
};
static const struct mvebu_system_controller orion_system_controller = {
@ -98,6 +101,16 @@ void mvebu_restart(enum reboot_mode mode, const char *cmd)
;
}
#ifdef CONFIG_SMP
void mvebu_system_controller_set_cpu_boot_addr(void *boot_addr)
{
BUG_ON(system_controller_base == NULL);
BUG_ON(mvebu_sc->resume_boot_addr == 0);
writel(virt_to_phys(boot_addr), system_controller_base +
mvebu_sc->resume_boot_addr);
}
#endif
static int __init mvebu_system_controller_init(void)
{
const struct of_device_id *match;
@ -114,4 +127,4 @@ static int __init mvebu_system_controller_init(void)
return 0;
}
arch_initcall(mvebu_system_controller_init);
early_initcall(mvebu_system_controller_init);