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arm64: zynqmp: Add new command for TCM initialization

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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 <siva.durga.paladugu@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Siva Durga Prasad Paladugu 2018-10-05 15:09:05 +05:30 committed by Michal Simek
parent 12ad2994a5
commit 5860bc16b9
3 changed files with 43 additions and 3 deletions
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6
arch/arm/cpu/armv8/zynqmp/cpu.c
View File

@ -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);

3
arch/arm/include/asm/arch-zynqmp/sys_proto.h
View File

@ -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 */

37
board/xilinx/zynqmp/cmds.c
View File

@ -6,6 +6,7 @@
#include <common.h>
#include <malloc.h>
#include <asm/arch/hardware.h>
#include <asm/arch/sys_proto.h>
#include <asm/io.h>
@ -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(