diff options
Diffstat (limited to 'arch/arm/mach-imx/imx_bootaux.c')
| -rw-r--r-- | arch/arm/mach-imx/imx_bootaux.c | 36 |
1 files changed, 28 insertions, 8 deletions
diff --git a/arch/arm/mach-imx/imx_bootaux.c b/arch/arm/mach-imx/imx_bootaux.c index b62dfbf6bf..02728514b7 100644 --- a/arch/arm/mach-imx/imx_bootaux.c +++ b/arch/arm/mach-imx/imx_bootaux.c @@ -5,21 +5,41 @@ */ #include <common.h> +#include <asm/io.h> #include <command.h> #include <linux/compiler.h> -/* Allow for arch specific config before we boot */ -int __weak arch_auxiliary_core_up(u32 core_id, u32 boot_private_data) +int arch_auxiliary_core_up(u32 core_id, ulong boot_private_data) { - /* please define platform specific arch_auxiliary_core_up() */ - return CMD_RET_FAILURE; + ulong stack, pc; + + if (!boot_private_data) + return -EINVAL; + + stack = *(ulong *)boot_private_data; + pc = *(ulong *)(boot_private_data + 4); + + /* Set the stack and pc to M4 bootROM */ + writel(stack, M4_BOOTROM_BASE_ADDR); + writel(pc, M4_BOOTROM_BASE_ADDR + 4); + + /* Enable M4 */ + clrsetbits_le32(SRC_BASE_ADDR + SRC_M4_REG_OFFSET, + SRC_M4C_NON_SCLR_RST_MASK, SRC_M4_ENABLE_MASK); + + return 0; } -/* Allow for arch specific config before we boot */ -int __weak arch_auxiliary_core_check_up(u32 core_id) +int arch_auxiliary_core_check_up(u32 core_id) { - /* please define platform specific arch_auxiliary_core_check_up() */ - return 0; + unsigned int val; + + val = readl(SRC_BASE_ADDR + SRC_M4_REG_OFFSET); + + if (val & SRC_M4C_NON_SCLR_RST_MASK) + return 0; /* assert in reset */ + + return 1; } /* |