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| author | Peng Fan <peng.fan@nxp.com> | 2016-01-28 16:55:07 +0800 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2016-02-21 11:46:26 +0100 |
| commit | 83703a1ccf2fda45503e161aad7231c82e411034 (patch) | |
| tree | 1d0194be1858af6c1f5fa2fca760678464f198e0 /arch | |
| parent | 3fe0b104604e267aadc8d9197097421cc02ca103 (diff) | |
| download | u-boot-83703a1ccf2fda45503e161aad7231c82e411034.zip u-boot-83703a1ccf2fda45503e161aad7231c82e411034.tar.gz u-boot-83703a1ccf2fda45503e161aad7231c82e411034.tar.bz2 | |
imx: mx7: implement functions to boot auxiliary core
Implement arch_auxiliary_core_up and arch_auxiliary_core_check_up.
arch_auxiliary_core_check_up is used to check whether M4 is running
or not. arch_auxiliary_core_up is to boot M4 core, the m4 core will
use the pc and stack which is set in arch_auxiliary_core_up to set R15
and R13 register and boot.
Signed-off-by: Ye.Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/cpu/armv7/mx7/soc.c | 36 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-mx7/imx-regs.h | 5 |
2 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/mx7/soc.c b/arch/arm/cpu/armv7/mx7/soc.c index a6ab551..d934b8b 100644 --- a/arch/arm/cpu/armv7/mx7/soc.c +++ b/arch/arm/cpu/armv7/mx7/soc.c @@ -211,6 +211,42 @@ void imx_get_mac_from_fuse(int dev_id, unsigned char *mac) } #endif +#ifdef CONFIG_IMX_BOOTAUX +int arch_auxiliary_core_up(u32 core_id, u32 boot_private_data) +{ + u32 stack, pc; + struct src *src_reg = (struct src *)SRC_BASE_ADDR; + + if (!boot_private_data) + return 1; + + stack = *(u32 *)boot_private_data; + pc = *(u32 *)(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_reg->m4rcr, SRC_M4RCR_M4C_NON_SCLR_RST_MASK, + SRC_M4RCR_ENABLE_M4_MASK); + + return 0; +} + +int arch_auxiliary_core_check_up(u32 core_id) +{ + uint32_t val; + struct src *src_reg = (struct src *)SRC_BASE_ADDR; + + val = readl(&src_reg->m4rcr); + if (val & 0x00000001) + return 0; /* assert in reset */ + + return 1; +} +#endif + void set_wdog_reset(struct wdog_regs *wdog) { u32 reg = readw(&wdog->wcr); diff --git a/arch/arm/include/asm/arch-mx7/imx-regs.h b/arch/arm/include/asm/arch-mx7/imx-regs.h index 5049a76..a3106e7 100644 --- a/arch/arm/include/asm/arch-mx7/imx-regs.h +++ b/arch/arm/include/asm/arch-mx7/imx-regs.h @@ -263,6 +263,11 @@ struct src { u32 ddrc_rcr; }; +#define SRC_M4RCR_M4C_NON_SCLR_RST_OFFSET 0 +#define SRC_M4RCR_M4C_NON_SCLR_RST_MASK (1 << 0) +#define SRC_M4RCR_ENABLE_M4_OFFSET 3 +#define SRC_M4RCR_ENABLE_M4_MASK (1 << 3) + /* GPR0 Bit Fields */ #define IOMUXC_GPR_GPR0_DMAREQ_MUX_SEL0_MASK 0x1u #define IOMUXC_GPR_GPR0_DMAREQ_MUX_SEL0_SHIFT 0 |