From 26c6bd7f688cf2e5afbb1a0cdc49f6d197fb875d Mon Sep 17 00:00:00 2001 From: Ye Li Date: Tue, 31 Jan 2023 16:42:20 +0800 Subject: [PATCH] imx: imx8ulp: Reconfigure MRC3 for SRAM0 access Some space in SRAM0 will be protected by S400 to allow RX SecPriv mode access only for boot purpose. Since SW will reuse the SRAM0 as SCMI buffer and SPL container loading buffer, need to reconfigure MRC3. Signed-off-by: Ye Li Reviewed-by: Peng Fan --- arch/arm/mach-imx/imx8ulp/rdc.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/arm/mach-imx/imx8ulp/rdc.c b/arch/arm/mach-imx/imx8ulp/rdc.c index 86310ca0b8..8db96c1886 100644 --- a/arch/arm/mach-imx/imx8ulp/rdc.c +++ b/arch/arm/mach-imx/imx8ulp/rdc.c @@ -276,6 +276,21 @@ void xrdc_init_mda(void) void xrdc_init_mrc(void) { + /* Re-config MRC3 for SRAM0 in case protected by S400 */ + xrdc_config_mrc_w0_w1(3, 0, 0x22010000, 0x10000); + xrdc_config_mrc_dx_perm(3, 0, 0, 1); + xrdc_config_mrc_dx_perm(3, 0, 1, 1); + xrdc_config_mrc_dx_perm(3, 0, 4, 1); + xrdc_config_mrc_dx_perm(3, 0, 5, 1); + xrdc_config_mrc_dx_perm(3, 0, 6, 1); + xrdc_config_mrc_dx_perm(3, 0, 7, 1); + xrdc_config_mrc_w3_w4(3, 0, 0x0, 0x80000FFF); + + /* Clear other 3 regions of MRC3 to invalid */ + xrdc_config_mrc_w3_w4(3, 1, 0x0, 0x0); + xrdc_config_mrc_w3_w4(3, 2, 0x0, 0x0); + xrdc_config_mrc_w3_w4(3, 3, 0x0, 0x0); + /* Set MRC4 and MRC5 for DDR access from A35 and AP NIC PER masters */ xrdc_config_mrc_w0_w1(4, 0, CFG_SYS_SDRAM_BASE, PHYS_SDRAM_SIZE); xrdc_config_mrc_dx_perm(4, 0, 1, 1); -- 2.39.5