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authorVipul Kumar <vipul.kumar@xilinx.com>2018-07-16 18:04:22 +0530
committerMichal Simek <michal.simek@xilinx.com>2018-07-19 10:49:56 +0200
commit0358cee5959fca0fea1074d038359d9d15a5a11e (patch)
tree1f3c7ce0ea40d273f46ac085a8227675185eedc1 /board
parentf5ed3605851abe428e36ceb775bf9a704fc5fe01 (diff)
arm64: zynqmp: Added support of mmio read and write commands
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>
Diffstat (limited to 'board')
-rw-r--r--board/xilinx/zynqmp/cmds.c48
1 files changed, 47 insertions, 1 deletions
diff --git a/board/xilinx/zynqmp/cmds.c b/board/xilinx/zynqmp/cmds.c
index 1f6a5dee1f..f8c8674f87 100644
--- a/board/xilinx/zynqmp/cmds.c
+++ b/board/xilinx/zynqmp/cmds.c
@@ -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(