From 7cad2e38d61e27ea59fb7944f7e647e97ef292d3 Mon Sep 17 00:00:00 2001 From: Ruchika Gupta Date: Mon, 29 Sep 2014 11:35:33 +0530 Subject: [PATCH] powerpc/mpc85xx: SECURE BOOT - Bypass PAMU in case of secure boot By default, PAMU's (IOMMU) are enabled in case of secure boot. Disable/bypass them once the control reaches the bootloader. For non-secure boot, PAMU's are already bypassed in the default SoC configuration. Signed-off-by: Ruchika Gupta Reviewed-by: York Sun --- arch/powerpc/cpu/mpc85xx/cpu_init.c | 9 ++++++++- arch/powerpc/include/asm/immap_85xx.h | 1 + 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c index 963e326..85d32fc 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu_init.c +++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c @@ -426,7 +426,8 @@ ulong cpu_init_f(void) { ulong flag = 0; extern void m8560_cpm_reset (void); -#ifdef CONFIG_SYS_DCSRBAR_PHYS +#if defined(CONFIG_SYS_DCSRBAR_PHYS) || \ + (defined(CONFIG_SECURE_BOOT) && defined(CONFIG_FSL_CORENET)) ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); #endif #if defined(CONFIG_SECURE_BOOT) @@ -458,6 +459,12 @@ ulong cpu_init_f(void) #if defined(CONFIG_SYS_CPC_REINIT_F) disable_cpc_sram(); #endif + +#if defined(CONFIG_FSL_CORENET) + /* Put PAMU in bypass mode */ + out_be32(&gur->pamubypenr, FSL_CORENET_PAMU_BYPASS); +#endif + #endif #ifdef CONFIG_CPM2 diff --git a/arch/powerpc/include/asm/immap_85xx.h b/arch/powerpc/include/asm/immap_85xx.h index 88c1e08..0264523 100644 --- a/arch/powerpc/include/asm/immap_85xx.h +++ b/arch/powerpc/include/asm/immap_85xx.h @@ -1912,6 +1912,7 @@ defined(CONFIG_PPC_T1020) || defined(CONFIG_PPC_T1022) u8 res24[64]; u32 pblsr; /* Preboot loader status */ u32 pamubypenr; /* PAMU bypass enable */ +#define FSL_CORENET_PAMU_BYPASS 0xffff0000 u32 dmacr1; /* DMA control */ u8 res25[4]; u32 gensr1; /* General status */