iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ARM: mvebu: move Armada XP specific SMP initialization to platsmp.c

Browse Source 
The pmsu.c driver contained an armada_xp_boot_cpu() function that sets
the boot address of a secondary CPUs and deasserts the reset. However,
the Armada 375 needs a slightly different logic, so it makes more
sense to move this code into the Armada XP specific platsmp.c.

In order to achieve this, the mvebu_pmsu_set_cpu_boot_addr() function
is exported. It will be needed for both the Armada XP and Armada 38x
SMP implementations.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Link: https://lkml.kernel.org/r/1397483648-26611-2-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Thomas Petazzoni 2014-04-14 15:53:58 +02:00 committed by Jason Cooper
parent d269a36ae7
commit 05ad690608
3 changed files with 11 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/mach-mvebu/common.h
View File

@ -19,6 +19,7 @@
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 armada_xp_cpu_die(unsigned int cpu);

10
arch/arm/mach-mvebu/platsmp.c
View File

@ -77,9 +77,17 @@ static void armada_xp_secondary_init(unsigned int cpu)
static int armada_xp_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
int ret, hw_cpu;
pr_info("Booting CPU %d\n", cpu);
armada_xp_boot_cpu(cpu, armada_xp_secondary_startup);
hw_cpu = cpu_logical_map(cpu);
mvebu_pmsu_set_cpu_boot_addr(hw_cpu, armada_xp_secondary_startup);
ret = mvebu_cpu_reset_deassert(hw_cpu);
if (ret) {
pr_warn("unable to boot CPU: %d\n", ret);
return ret;
}
return 0;
}

26
arch/arm/mach-mvebu/pmsu.c
View File

@ -41,36 +41,12 @@ static struct of_device_id of_pmsu_table[] = {
{ /* end of list */ },
};
static void mvebu_pmsu_set_cpu_boot_addr(int hw_cpu, void *boot_addr)
void mvebu_pmsu_set_cpu_boot_addr(int hw_cpu, void *boot_addr)
{
writel(virt_to_phys(boot_addr), pmsu_mp_base +
PMSU_BOOT_ADDR_REDIRECT_OFFSET(hw_cpu));
}
#ifdef CONFIG_SMP
int armada_xp_boot_cpu(unsigned int cpu_id, void *boot_addr)
{
int hw_cpu, ret;
if (!pmsu_mp_base) {
pr_warn("Can't boot CPU. PMSU is uninitialized\n");
return -ENODEV;
}
hw_cpu = cpu_logical_map(cpu_id);
mvebu_pmsu_set_cpu_boot_addr(hw_cpu, boot_addr);
ret = mvebu_cpu_reset_deassert(hw_cpu);
if (ret) {
pr_warn("unable to boot CPU: %d\n", ret);
return ret;
}
return 0;
}
#endif
static int __init armada_370_xp_pmsu_init(void)
{
struct device_node *np;