diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-omap2/omap-headsmp.S | 35 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/omap-smp.c | 24 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/smp.h | 2 |
3 files changed, 37 insertions, 24 deletions
diff --git a/arch/arm/mach-omap2/omap-headsmp.S b/arch/arm/mach-omap2/omap-headsmp.S index 4afadba09477..aa3f65c2ac97 100644 --- a/arch/arm/mach-omap2/omap-headsmp.S +++ b/arch/arm/mach-omap2/omap-headsmp.S @@ -27,20 +27,39 @@ * OMAP4 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 the this flag using a hardware - * register AuxCoreBoot1. + * The primary core will update this flag using a hardware + * register AuxCoreBoot0. */ ENTRY(omap_secondary_startup) - mrc p15, 0, r0, c0, c0, 5 - and r0, r0, #0x0f -hold: ldr r1, =OMAP4_AUX_CORE_BOOT1_PA @ read from AuxCoreBoot1 - ldr r2, [r1] - cmp r2, r0 +hold: ldr r12,=0x103 + dsb + smc @ read from AuxCoreBoot0 + mov r0, r0, lsr #9 + mrc p15, 0, r4, c0, c0, 5 + and r4, r4, #0x0f + cmp r0, r4 bne hold /* - * we've been released from the cpu_release,secondary_stack + * we've been released from the wait loop,secondary_stack * should now contain the SVC stack for this core */ b secondary_startup +END(omap_secondary_startup) + +ENTRY(omap_modify_auxcoreboot0) + stmfd sp!, {r1-r12, lr} + ldr r12, =0x104 + dsb + smc + ldmfd sp!, {r1-r12, pc} +END(omap_modify_auxcoreboot0) + +ENTRY(omap_auxcoreboot_addr) + stmfd sp!, {r2-r12, lr} + ldr r12, =0x105 + dsb + smc + ldmfd sp!, {r2-r12, pc} +END(omap_auxcoreboot_addr) diff --git a/arch/arm/mach-omap2/omap-smp.c b/arch/arm/mach-omap2/omap-smp.c index 4890bcf4dadd..59e847843af5 100644 --- a/arch/arm/mach-omap2/omap-smp.c +++ b/arch/arm/mach-omap2/omap-smp.c @@ -21,15 +21,12 @@ #include <linux/smp.h> #include <linux/io.h> +#include <asm/cacheflush.h> #include <asm/localtimer.h> #include <asm/smp_scu.h> #include <mach/hardware.h> #include <plat/common.h> -/* Registers used for communicating startup information */ -static void __iomem *omap4_auxcoreboot_reg0; -static void __iomem *omap4_auxcoreboot_reg1; - /* SCU base address */ static void __iomem *scu_base; @@ -74,12 +71,13 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle) spin_lock(&boot_lock); /* - * Update the AuxCoreBoot1 with boot state for secondary core. + * Update the AuxCoreBoot0 with boot state for secondary core. * omap_secondary_startup() routine will hold the secondary core till * the AuxCoreBoot1 register is updated with cpu state * A barrier is added to ensure that write buffer is drained */ - __raw_writel(cpu, omap4_auxcoreboot_reg1); + omap_modify_auxcoreboot0(0x200, 0x0); + flush_cache_all(); smp_wmb(); timeout = jiffies + (1 * HZ); @@ -99,17 +97,18 @@ static void __init wakeup_secondary(void) { /* * Write the address of secondary startup routine into the - * AuxCoreBoot0 where ROM code will jump and start executing + * AuxCoreBoot1 where ROM code will jump and start executing * on secondary core once out of WFE * A barrier is added to ensure that write buffer is drained */ - __raw_writel(virt_to_phys(omap_secondary_startup), \ - omap4_auxcoreboot_reg0); + omap_auxcoreboot_addr(virt_to_phys(omap_secondary_startup)); smp_wmb(); /* * Send a 'sev' to wake the secondary core from WFE. + * Drain the outstanding writes to memory */ + dsb(); set_event(); mb(); } @@ -136,7 +135,6 @@ void __init smp_prepare_cpus(unsigned int max_cpus) { unsigned int ncores = get_core_count(); unsigned int cpu = smp_processor_id(); - void __iomem *omap4_wkupgen_base; int i; /* sanity check */ @@ -168,12 +166,6 @@ void __init smp_prepare_cpus(unsigned int max_cpus) for (i = 0; i < max_cpus; i++) set_cpu_present(i, true); - /* Never released */ - omap4_wkupgen_base = ioremap(OMAP44XX_WKUPGEN_BASE, SZ_4K); - BUG_ON(!omap4_wkupgen_base); - omap4_auxcoreboot_reg0 = omap4_wkupgen_base + 0x800; - omap4_auxcoreboot_reg1 = omap4_wkupgen_base + 0x804; - if (max_cpus > 1) { /* * Enable the local timer or broadcast device for the diff --git a/arch/arm/plat-omap/include/plat/smp.h b/arch/arm/plat-omap/include/plat/smp.h index dcaa8fde7063..8983d54c4fd2 100644 --- a/arch/arm/plat-omap/include/plat/smp.h +++ b/arch/arm/plat-omap/include/plat/smp.h @@ -28,6 +28,8 @@ /* Needed for secondary core boot */ 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); /* * We use Soft IRQ1 as the IPI |
