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feat(imx8mn): optionally take params from BL2

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Optionally take params from BL2 to offer more flexibility to BL2 on
where and if a BL32 image is expected. This uses imx_bl31_params_parse()
to check if arg0 can safely be accessed as a pointer and actually
contains a bl_params_t structure. If not, the hardcoded parameter
values are used as before.

Change-Id: Ia12d35778f4d550860e517f2a1f5c5d062f3283a
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2024-01-18 11:18:24 +01:00
parent 11d32b33ea
commit c37a877e56
3 changed files with 13 additions and 2 deletions
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10
plat/imx/imx8m/imx8mn/imx8mn_bl31_setup.c
View file

@ -29,6 +29,7 @@
#include <imx8m_csu.h>
#include <imx8m_snvs.h>
#include <platform_def.h>
#include <plat_common.h>
#include <plat_imx8.h>
#define TRUSTY_PARAMS_LEN_BYTES (4096*2)
@ -126,7 +127,7 @@ void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
unsigned int console_base = IMX_BOOT_UART_BASE;
static console_t console;
unsigned int val;
int i;
int i, ret;
/* Enable CSU NS access permission */
for (i = 0; i < 64; i++) {
@ -192,6 +193,13 @@ void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
#endif
#endif
ret = imx_bl31_params_parse(arg0, IMX_NS_OCRAM_SIZE, IMX_NS_OCRAM_BASE,
&bl32_image_ep_info, &bl33_image_ep_info);
if (ret != 0) {
imx_bl31_params_parse(arg0, IMX_TCM_BASE, IMX_TCM_SIZE,
&bl32_image_ep_info, &bl33_image_ep_info);
}
#if !defined(SPD_opteed) && !defined(SPD_trusty)
enable_snvs_privileged_access();
#endif

2
plat/imx/imx8m/imx8mn/include/platform_def.h
View file

@ -140,6 +140,8 @@
#define OCRAM_S_SIZE U(0x8000)
#define OCRAM_S_LIMIT (OCRAM_S_BASE + OCRAM_S_SIZE)
#define SAVED_DRAM_TIMING_BASE OCRAM_S_BASE
#define IMX_TCM_BASE U(0x7E0000)
#define IMX_TCM_SIZE U(0x40000)
#define COUNTER_FREQUENCY 8000000 /* 8MHz */

3
plat/imx/imx8m/imx8mn/platform.mk
View file

@ -25,7 +25,8 @@ IMX_GIC_SOURCES := ${GICV3_SOURCES} \
plat/common/plat_psci_common.c \
plat/imx/common/plat_imx8_gic.c
BL31_SOURCES += plat/imx/common/imx8_helpers.S \
BL31_SOURCES += common/desc_image_load.c \
plat/imx/common/imx8_helpers.S \
plat/imx/imx8m/gpc_common.c \
plat/imx/imx8m/imx_hab.c \
plat/imx/imx8m/imx_aipstz.c \