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arm64: zynqmp: Added support of mmio read and write commands

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This patch added support of mmio read and write commands. These commands
can be used to read and write registers from the u-boot command line.
It can be useful in debugging.

Signed-off-by: Vipul Kumar <vipul.kumar@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Vipul Kumar 2018-07-16 18:04:22 +05:30 committed by Michal Simek
parent f5ed360585
commit 0358cee595
1 changed files with 47 additions and 1 deletions
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48
board/xilinx/zynqmp/cmds.c
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@ -61,8 +61,51 @@ static int do_zynqmp_verify_secure(cmd_tbl_t *cmdtp, int flag, int argc,
return ret;
}
static int do_zynqmp_mmio_read(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
u32 read_val, addr;
int ret;
if (argc != cmdtp->maxargs)
return CMD_RET_USAGE;
addr = simple_strtoul(argv[2], NULL, 16);
ret = zynqmp_mmio_read(addr, &read_val);
if (!ret)
printf("mmio read value at 0x%x = 0x%x\n",
addr, read_val);
else
printf("Failed: mmio read\n");
return ret;
}
static int do_zynqmp_mmio_write(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
u32 addr, mask, val;
int ret;
if (argc != cmdtp->maxargs)
return CMD_RET_USAGE;
addr = simple_strtoul(argv[2], NULL, 16);
mask = simple_strtoul(argv[3], NULL, 16);
val = simple_strtoul(argv[4], NULL, 16);
ret = zynqmp_mmio_write(addr, mask, val);
if (ret != 0)
printf("Failed: mmio write\n");
return ret;
}
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, "", ""),
};
/**
@ -99,7 +142,10 @@ static char zynqmp_help_text[] =
"secure src len [key_addr] - verifies secure images of $len bytes\n"
" long at address $src. Optional key_addr\n"
" can be specified if user key needs to\n"
" be used for decryption\n";
" 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";
#endif
U_BOOT_CMD(