diff options
Diffstat (limited to 'arch/arm/mach-omap2')
| -rw-r--r-- | arch/arm/mach-omap2/common.h | 1 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/omap-headsmp.S | 21 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/omap-smp.c | 35 |
3 files changed, 45 insertions, 12 deletions
diff --git a/arch/arm/mach-omap2/common.h b/arch/arm/mach-omap2/common.h index 97e8792b33b0..960f98451a2e 100644 --- a/arch/arm/mach-omap2/common.h +++ b/arch/arm/mach-omap2/common.h @@ -276,6 +276,7 @@ extern void omap_secondary_startup(void); extern u32 omap_modify_auxcoreboot0(u32 set_mask, u32 clear_mask); extern void omap_auxcoreboot_addr(u32 cpu_addr); extern u32 omap_read_auxcoreboot0(void); +extern void omap5_secondary_startup(void); #endif #if defined(CONFIG_SMP) && defined(CONFIG_PM) diff --git a/arch/arm/mach-omap2/omap-headsmp.S b/arch/arm/mach-omap2/omap-headsmp.S index 503ac777a2ba..502e3135aad3 100644 --- a/arch/arm/mach-omap2/omap-headsmp.S +++ b/arch/arm/mach-omap2/omap-headsmp.S @@ -19,6 +19,27 @@ #include <linux/init.h> __CPUINIT + +/* Physical address needed since MMU not enabled yet on secondary core */ +#define AUX_CORE_BOOT0_PA 0x48281800 + +/* + * OMAP5 specific entry point for secondary CPU to jump from ROM + * code. This routine also provides a holding flag into which + * secondary core is held until we're ready for it to initialise. + * The primary core will update this flag using a hardware ++ * register AuxCoreBoot0. + */ +ENTRY(omap5_secondary_startup) +wait: ldr r2, =AUX_CORE_BOOT0_PA @ read from AuxCoreBoot0 + ldr r0, [r2] + mov r0, r0, lsr #5 + mrc p15, 0, r4, c0, c0, 5 + and r4, r4, #0x0f + cmp r0, r4 + bne wait + b secondary_startup +END(omap5_secondary_startup) /* * OMAP4 specific entry point for secondary CPU to jump from ROM * code. This routine also provides a holding flag into which diff --git a/arch/arm/mach-omap2/omap-smp.c b/arch/arm/mach-omap2/omap-smp.c index badfe398038e..7d118b9bdd5f 100644 --- a/arch/arm/mach-omap2/omap-smp.c +++ b/arch/arm/mach-omap2/omap-smp.c @@ -33,6 +33,12 @@ #include "common.h" #include "clockdomain.h" +#define CPU_MASK 0xff0ffff0 +#define CPU_CORTEX_A9 0x410FC090 +#define CPU_CORTEX_A15 0x410FC0F0 + +#define OMAP5_CORE_COUNT 0x2 + /* SCU base address */ static void __iomem *scu_base; @@ -133,7 +139,6 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle) static void __init wakeup_secondary(void) { void __iomem *base = omap_get_wakeupgen_base(); - /* * Write the address of secondary startup routine into the * AuxCoreBoot1 where ROM code will jump and start executing @@ -162,16 +167,21 @@ static void __init wakeup_secondary(void) */ void __init smp_init_cpus(void) { - unsigned int i, ncores; - - /* - * Currently we can't call ioremap here because - * SoC detection won't work until after init_early. - */ - scu_base = OMAP2_L4_IO_ADDRESS(OMAP44XX_SCU_BASE); - BUG_ON(!scu_base); - - ncores = scu_get_core_count(scu_base); + unsigned int i = 0, ncores = 1, cpu_id; + + /* Use ARM cpuid check here, as SoC detection will not work so early */ + cpu_id = read_cpuid(CPUID_ID) & CPU_MASK; + if (cpu_id == CPU_CORTEX_A9) { + /* + * Currently we can't call ioremap here because + * SoC detection won't work until after init_early. + */ + scu_base = OMAP2_L4_IO_ADDRESS(OMAP44XX_SCU_BASE); + BUG_ON(!scu_base); + ncores = scu_get_core_count(scu_base); + } else if (cpu_id == CPU_CORTEX_A15) { + ncores = OMAP5_CORE_COUNT; + } /* sanity check */ if (ncores > nr_cpu_ids) { @@ -193,6 +203,7 @@ void __init platform_smp_prepare_cpus(unsigned int max_cpus) * Initialise the SCU and wake up the secondary core using * wakeup_secondary(). */ - scu_enable(scu_base); + if (scu_base) + scu_enable(scu_base); wakeup_secondary(); } |