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| author | Andrey Smirnov <andrew.smirnov@gmail.com> | 2018-07-19 18:03:49 -0700 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2018-08-08 08:29:29 +0200 |
| commit | 24546157658047ea3514b8115dccc3d0d0350e85 (patch) | |
| tree | 67f62c6ea46119f0061385a5922d5c1571687c96 /arch | |
| parent | 34b808bae266ede3dcef2bacdb7f8374ff7a09fe (diff) | |
| download | barebox-24546157658047ea3514b8115dccc3d0d0350e85.tar.gz barebox-24546157658047ea3514b8115dccc3d0d0350e85.tar.xz | |
ARM: i.MX8MQ: Add code to load BL31 ATF blob
Add imx8mq_atf_load_bl31() containing all of the code needed to load
and transfer control to BL31 ATF blob on i.MX8M.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-imx/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/mach-imx/atf.c | 41 | ||||
| -rw-r--r-- | arch/arm/mach-imx/include/mach/atf.h | 13 |
3 files changed, 55 insertions, 1 deletions
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile index 28fe60dba2..595a7512ce 100644 --- a/arch/arm/mach-imx/Makefile +++ b/arch/arm/mach-imx/Makefile @@ -17,7 +17,7 @@ lwl-$(CONFIG_ARCH_IMX6) += imx6-mmdc.o obj-$(CONFIG_ARCH_IMX7) += imx7.o obj-$(CONFIG_ARCH_VF610) += vf610.o obj-$(CONFIG_ARCH_IMX8MQ) += imx8mq.o -lwl-$(CONFIG_ARCH_IMX8MQ) += imx8-ddrc.o +lwl-$(CONFIG_ARCH_IMX8MQ) += imx8-ddrc.o atf.o obj-$(CONFIG_ARCH_IMX_XLOAD) += xload.o obj-$(CONFIG_IMX_IIM) += iim.o obj-$(CONFIG_NAND_IMX) += nand.o diff --git a/arch/arm/mach-imx/atf.c b/arch/arm/mach-imx/atf.c new file mode 100644 index 0000000000..c1b358d125 --- /dev/null +++ b/arch/arm/mach-imx/atf.c @@ -0,0 +1,41 @@ +#include <common.h> +#include <mach/atf.h> + +/** + * imx8mq_atf_load_bl31 - Load ATF BL31 blob and transfer control to it + * + * @fw: Pointer to the BL31 blob + * @fw_size: Size of the BL31 blob + * + * This function: + + * 1. Copies built-in BL31 blob to an address i.MX8M's BL31 + * expects to be placed + * + * 2. Sets up temporary stack pointer for EL2, which is execution + * level that BL31 will drop us off at after it completes its + * initialization routine + * + * 3. Transfers control to BL31 + * + * NOTE: This function expects NXP's implementation of ATF that can be + * found at: + * https://source.codeaurora.org/external/imx/imx-atf + * + * any other implementation may or may not work + * + */ +void imx8mq_atf_load_bl31(const void *fw, size_t fw_size) +{ + void __noreturn (*bl31)(void) = (void *)MX8MQ_ATF_BL31_BASE_ADDR; + + if (WARN_ON(fw_size > MX8MQ_ATF_BL31_SIZE_LIMIT)) + return; + + memcpy(bl31, fw, fw_size); + + asm volatile("msr sp_el2, %0" : : + "r" (MX8MQ_ATF_BL33_BASE_ADDR - 16) : + "cc"); + bl31(); +}
\ No newline at end of file diff --git a/arch/arm/mach-imx/include/mach/atf.h b/arch/arm/mach-imx/include/mach/atf.h new file mode 100644 index 0000000000..aeb24bad00 --- /dev/null +++ b/arch/arm/mach-imx/include/mach/atf.h @@ -0,0 +1,13 @@ +#ifndef __IMX_ATF_H__ +#define __IMX_ATF_H__ + +#include <linux/sizes.h> +#include <asm/system.h> + +#define MX8MQ_ATF_BL31_SIZE_LIMIT SZ_64K +#define MX8MQ_ATF_BL31_BASE_ADDR 0x00910000 +#define MX8MQ_ATF_BL33_BASE_ADDR 0x40200000 + +void imx8mq_atf_load_bl31(const void *fw, size_t fw_size); + +#endif
\ No newline at end of file |