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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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37
board/xilinx/zynqmp/cmds.c
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@@ -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(