diff options
Diffstat (limited to 'arch/arm/mach-omap2/pm34xx.c')
| -rw-r--r-- | arch/arm/mach-omap2/pm34xx.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c index 54fea79b1720..ebb88f3aae31 100644 --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -63,6 +63,8 @@ static LIST_HEAD(pwrst_list); static void (*_omap_sram_idle)(u32 *addr, int save_state); +static int (*_omap_save_secure_sram)(u32 *addr); + static struct powerdomain *mpu_pwrdm, *neon_pwrdm; static struct powerdomain *core_pwrdm, *per_pwrdm; @@ -110,6 +112,33 @@ static void omap3_core_restore_context(void) omap_dma_global_context_restore(); } +static void omap3_save_secure_ram_context(u32 target_mpu_state) +{ + u32 ret; + + if (omap_type() != OMAP2_DEVICE_TYPE_GP) { + /* Disable dma irq before calling secure rom code API */ + omap_dma_disable_irq(0); + omap_dma_disable_irq(1); + /* + * MPU next state must be set to POWER_ON temporarily, + * otherwise the WFI executed inside the ROM code + * will hang the system. + */ + pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_ON); + ret = _omap_save_secure_sram((u32 *) + __pa(omap3_secure_ram_storage)); + pwrdm_set_next_pwrst(mpu_pwrdm, target_mpu_state); + /* Following is for error tracking, it should not happen */ + if (ret) { + printk(KERN_ERR "save_secure_sram() returns %08x\n", + ret); + while (1) + ; + } + } +} + /* * PRCM Interrupt Handler Helper Function * @@ -308,6 +337,7 @@ static void omap_sram_idle(void) if (core_next_state == PWRDM_POWER_OFF) { omap3_core_save_context(); omap3_prcm_save_context(); + omap3_save_secure_ram_context(mpu_next_state); } /* Enable IO-PAD wakeup */ prm_set_mod_reg_bits(OMAP3430_EN_IO, WKUP_MOD, PM_WKEN); @@ -901,6 +931,9 @@ void omap_push_sram_idle(void) { _omap_sram_idle = omap_sram_push(omap34xx_cpu_suspend, omap34xx_cpu_suspend_sz); + if (omap_type() != OMAP2_DEVICE_TYPE_GP) + _omap_save_secure_sram = omap_sram_push(save_secure_ram_context, + save_secure_ram_context_sz); } static int __init omap3_pm_init(void) @@ -916,7 +949,6 @@ static int __init omap3_pm_init(void) /* XXX prcm_setup_regs needs to be before enabling hw * supervised mode for powerdomains */ prcm_setup_regs(); - omap3_save_scratchpad_contents(); ret = request_irq(INT_34XX_PRCM_MPU_IRQ, (irq_handler_t)prcm_interrupt_handler, @@ -961,6 +993,15 @@ static int __init omap3_pm_init(void) */ pwrdm_add_wkdep(per_pwrdm, core_pwrdm); + if (omap_type() != OMAP2_DEVICE_TYPE_GP) { + omap3_secure_ram_storage = + kmalloc(0x803F, GFP_KERNEL); + if (!omap3_secure_ram_storage) + printk(KERN_ERR "Memory allocation failed when" + "allocating for secure sram context\n"); + } + omap3_save_scratchpad_contents(); + err1: return ret; err2: |