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ARM: ux500: simplify secondary boot 

Inline the wakeup_secondary() static function, and keep the
backupram remapping around: it is reused when resuming from
suspend so no point in remapping it every time.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2016-06-02 16:10:06 +02:00
parent 7ce7d89f48
commit 9e634cae72
1 changed files with 19 additions and 26 deletions
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45
arch/arm/mach-ux500/platsmp.c
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@ -31,10 +31,14 @@
#define UX500_CPU1_JUMPADDR_OFFSET 0x1FF4
#define UX500_CPU1_WAKEMAGIC_OFFSET 0x1FF0
static void wakeup_secondary(void)
static void __iomem *backupram;
static void __init ux500_smp_prepare_cpus(unsigned int max_cpus)
{
struct device_node *np;
static void __iomem *backupram;
static void __iomem *scu_base;
unsigned int ncores;
int i;
np = of_find_compatible_node(NULL, NULL, "ste,dbx500-backupram");
if (!np) {
@ -48,29 +52,6 @@ static void wakeup_secondary(void)
return;
}
/*
* write the address of secondary startup into the backup ram register
* at offset 0x1FF4, then write the magic number 0xA1FEED01 to the
* backup ram register at offset 0x1FF0, which is what boot rom code
* is waiting for. This will wake up the secondary core from WFE.
*/
writel(virt_to_phys(secondary_startup),
backupram + UX500_CPU1_JUMPADDR_OFFSET);
writel(0xA1FEED01,
backupram + UX500_CPU1_WAKEMAGIC_OFFSET);
/* make sure write buffer is drained */
mb();
iounmap(backupram);
}
static void __init ux500_smp_prepare_cpus(unsigned int max_cpus)
{
struct device_node *np;
static void __iomem *scu_base;
unsigned int ncores;
int i;
np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu");
if (!np) {
pr_err("No SCU base address\n");
@ -92,7 +73,19 @@ static void __init ux500_smp_prepare_cpus(unsigned int max_cpus)
static int ux500_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
wakeup_secondary();
/*
* write the address of secondary startup into the backup ram register
* at offset 0x1FF4, then write the magic number 0xA1FEED01 to the
* backup ram register at offset 0x1FF0, which is what boot rom code
* is waiting for. This will wake up the secondary core from WFE.
*/
writel(virt_to_phys(secondary_startup),
backupram + UX500_CPU1_JUMPADDR_OFFSET);
writel(0xA1FEED01,
backupram + UX500_CPU1_WAKEMAGIC_OFFSET);
/* make sure write buffer is drained */
mb();
arch_send_wakeup_ipi_mask(cpumask_of(cpu));
return 0;
}