From 5860bc16b918bb5456a4a77930eafd7c858f70db Mon Sep 17 00:00:00 2001 From: Siva Durga Prasad Paladugu Date: Fri, 5 Oct 2018 15:09:05 +0530 Subject: [PATCH] arm64: zynqmp: Add new command for TCM initialization This patch adds new zynqmp command "zynqmp tcminit mode" to initialize TCM. TCM needs to be initialized before accessing to avoid ECC errors. This new command helps to perform the same. It also makes tcm_init() as global and uses it for doing the TCM initialization. Signed-off-by: Siva Durga Prasad Paladugu Signed-off-by: Michal Simek --- arch/arm/cpu/armv8/zynqmp/cpu.c | 6 ++-- arch/arm/include/asm/arch-zynqmp/sys_proto.h | 3 ++ board/xilinx/zynqmp/cmds.c | 37 +++++++++++++++++++- 3 files changed, 43 insertions(+), 3 deletions(-) diff --git a/arch/arm/cpu/armv8/zynqmp/cpu.c b/arch/arm/cpu/armv8/zynqmp/cpu.c index 3ed631e505..4ee8e3f627 100644 --- a/arch/arm/cpu/armv8/zynqmp/cpu.c +++ b/arch/arm/cpu/armv8/zynqmp/cpu.c @@ -104,14 +104,16 @@ u64 get_page_table_size(void) return 0x14000; } -#ifdef CONFIG_SYS_MEM_RSVD_FOR_MMU -static void tcm_init(u8 mode) +#if defined(CONFIG_SYS_MEM_RSVD_FOR_MMU) || defined(CONFIG_DEFINE_TCM_OCM_MMAP) +void tcm_init(u8 mode) { puts("WARNING: Initializing TCM overwrites TCM content\n"); initialize_tcm(mode); memset((void *)ZYNQMP_TCM_BASE_ADDR, 0, ZYNQMP_TCM_SIZE); } +#endif +#ifdef CONFIG_SYS_MEM_RSVD_FOR_MMU int reserve_mmu(void) { tcm_init(TCM_LOCK); diff --git a/arch/arm/include/asm/arch-zynqmp/sys_proto.h b/arch/arm/include/asm/arch-zynqmp/sys_proto.h index 9fa44d084c..385c8825f2 100644 --- a/arch/arm/include/asm/arch-zynqmp/sys_proto.h +++ b/arch/arm/include/asm/arch-zynqmp/sys_proto.h @@ -68,5 +68,8 @@ int invoke_smc(u32 pm_api_id, u32 arg0, u32 arg1, u32 arg2, u32 arg3, void initialize_tcm(bool mode); void mem_map_fill(void); int chip_id(unsigned char id); +#if defined(CONFIG_SYS_MEM_RSVD_FOR_MMU) || defined(CONFIG_DEFINE_TCM_OCM_MMAP) +void tcm_init(u8 mode); +#endif #endif /* _ASM_ARCH_SYS_PROTO_H */ diff --git a/board/xilinx/zynqmp/cmds.c b/board/xilinx/zynqmp/cmds.c index f8c8674f87..3e039ccb13 100644 --- a/board/xilinx/zynqmp/cmds.c +++ b/board/xilinx/zynqmp/cmds.c @@ -6,6 +6,7 @@ #include #include +#include #include #include @@ -102,10 +103,36 @@ static int do_zynqmp_mmio_write(cmd_tbl_t *cmdtp, int flag, int argc, return ret; } +#ifdef CONFIG_DEFINE_TCM_OCM_MMAP +static int do_zynqmp_tcm_init(cmd_tbl_t *cmdtp, int flag, int argc, + char * const argv[]) +{ + u8 mode; + + if (argc != cmdtp->maxargs) + return CMD_RET_USAGE; + + mode = simple_strtoul(argv[2], NULL, 16); + if (mode != TCM_LOCK && mode != TCM_SPLIT) { + printf("Mode should be either 0(lock)/1(split)\n"); + return CMD_RET_FAILURE; + } + + dcache_disable(); + tcm_init(mode); + dcache_enable(); + + return CMD_RET_SUCCESS; +} +#endif + static cmd_tbl_t cmd_zynqmp_sub[] = { U_BOOT_CMD_MKENT(secure, 5, 0, do_zynqmp_verify_secure, "", ""), U_BOOT_CMD_MKENT(mmio_read, 3, 0, do_zynqmp_mmio_read, "", ""), U_BOOT_CMD_MKENT(mmio_write, 5, 0, do_zynqmp_mmio_write, "", ""), +#ifdef CONFIG_DEFINE_TCM_OCM_MMAP + U_BOOT_CMD_MKENT(tcminit, 3, 0, do_zynqmp_tcm_init, "", ""), +#endif }; /** @@ -145,7 +172,15 @@ static char zynqmp_help_text[] = " be used for decryption\n" "zynqmp mmio_read address - read from address\n" "zynqmp mmio_write address mask value - write value after masking to\n" - " address\n"; + " address\n" +#ifdef CONFIG_DEFINE_TCM_OCM_MMAP + "zynqmp tcminit mode - Initialize the TCM with zeros. TCM needs to be\n" + " initialized before accessing to avoid ECC\n" + " errors. mode specifies in which mode TCM has\n" + " to be initialized. Supported modes will be\n" + " lock(0)/split(1)\n" +#endif + ; #endif U_BOOT_CMD( -- 2.30.2