leandrof/u-boot
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

48
board/xilinx/zynqmp/cmds.c
View File

@@ -61,8 +61,51 @@ static int do_zynqmp_verify_secure(cmd_tbl_t *cmdtp, int flag, int argc,
return ret; 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[] = { static cmd_tbl_t cmd_zynqmp_sub[] = {
U_BOOT_CMD_MKENT(secure, 5, 0, do_zynqmp_verify_secure, "", ""), 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" "secure src len [key_addr] - verifies secure images of $len bytes\n"
" long at address $src. Optional key_addr\n" " long at address $src. Optional key_addr\n"
" can be specified if user key needs to\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 #endif
U_BOOT_CMD( U_BOOT_CMD(