diff options
Diffstat (limited to 'arch/arm/mach-omap2/omap-smp.c')
| -rw-r--r-- | arch/arm/mach-omap2/omap-smp.c | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/omap-smp.c b/arch/arm/mach-omap2/omap-smp.c index 4d05fa8a4e4..cd42d921940 100644 --- a/arch/arm/mach-omap2/omap-smp.c +++ b/arch/arm/mach-omap2/omap-smp.c @@ -32,6 +32,7 @@ #include "iomap.h" #include "common.h" #include "clockdomain.h" +#include "pm.h" #define CPU_MASK 0xff0ffff0 #define CPU_CORTEX_A9 0x410FC090 @@ -39,6 +40,8 @@ #define OMAP5_CORE_COUNT 0x2 +u16 pm44xx_errata; + /* SCU base address */ static void __iomem *scu_base; @@ -118,8 +121,37 @@ static int __cpuinit omap4_boot_secondary(unsigned int cpu, struct task_struct * * 4.3.4.2 Power States of CPU0 and CPU1 */ if (booted) { + /* + * GIC distributor control register has changed between + * CortexA9 r1pX and r2pX. The Control Register secure + * banked version is now composed of 2 bits: + * bit 0 == Secure Enable + * bit 1 == Non-Secure Enable + * The Non-Secure banked register has not changed + * Because the ROM Code is based on the r1pX GIC, the CPU1 + * GIC restoration will cause a problem to CPU0 Non-Secure SW. + * The workaround must be: + * 1) Before doing the CPU1 wakeup, CPU0 must disable + * the GIC distributor + * 2) CPU1 must re-enable the GIC distributor on + * it's wakeup path. + */ + if (IS_PM44XX_ERRATUM(PM_OMAP4_ROM_SMP_BOOT_ERRATUM_GICD)) { + local_irq_disable(); + gic_dist_disable(); + } + clkdm_wakeup(cpu1_clkdm); clkdm_allow_idle(cpu1_clkdm); + + if (IS_PM44XX_ERRATUM(PM_OMAP4_ROM_SMP_BOOT_ERRATUM_GICD)) { + while (gic_dist_disabled()) { + udelay(1); + cpu_relax(); + } + gic_timer_retrigger(); + local_irq_enable(); + } } else { dsb_sev(); booted = true; @@ -138,7 +170,14 @@ static int __cpuinit omap4_boot_secondary(unsigned int cpu, struct task_struct * static void __init wakeup_secondary(void) { + void *startup_addr = omap_secondary_startup; void __iomem *base = omap_get_wakeupgen_base(); + + if (cpu_is_omap446x()) { + startup_addr = omap_secondary_startup_4460; + pm44xx_errata |= PM_OMAP4_ROM_SMP_BOOT_ERRATUM_GICD; + } + /* * Write the address of secondary startup routine into the * AuxCoreBoot1 where ROM code will jump and start executing @@ -146,7 +185,7 @@ static void __init wakeup_secondary(void) * A barrier is added to ensure that write buffer is drained */ if (omap_secure_apis_support()) - omap_auxcoreboot_addr(virt_to_phys(omap_secondary_startup)); + omap_auxcoreboot_addr(virt_to_phys(startup_addr)); else __raw_writel(virt_to_phys(omap5_secondary_startup), base + OMAP_AUX_CORE_BOOT_1); |