This introcudes the ramdisk command, to control
the ramdisk devices.
Signed-off-by: Masahisa Kojima <masahisa.koj...@linaro.org>
---
Newly introcuded in v2
cmd/Kconfig | 7 ++++
cmd/Makefile | 1 +
cmd/ramdisk.c | 92 +++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 100 insertions(+)
create mode 100644 cmd/ramdisk.c
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 365371fb51..5f3022b0c9 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1592,6 +1592,13 @@ config CMD_AXI
Interface) busses, a on-chip interconnect specification for managing
functional blocks in SoC designs, which is also often used in designs
involving FPGAs (e.g. communication with IP cores in Xilinx FPGAs).
+
+config CMD_RAM_DISK
+ bool "ramdisk"
+ depends on RAM_DISK
+ help
+ This provides commands to control the ramdisk devices.
+
endmenu
diff --git a/cmd/Makefile b/cmd/Makefile
index 6c37521b4e..eb7d86a3c6 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -142,6 +142,7 @@ obj-$(CONFIG_CMD_PWM) += pwm.o
obj-$(CONFIG_CMD_PXE) += pxe.o
obj-$(CONFIG_CMD_WOL) += wol.o
obj-$(CONFIG_CMD_QFW) += qfw.o
+obj-$(CONFIG_CMD_RAM_DISK) += ramdisk.o
obj-$(CONFIG_CMD_READ) += read.o
obj-$(CONFIG_CMD_WRITE) += read.o
obj-$(CONFIG_CMD_REGINFO) += reginfo.o
diff --git a/cmd/ramdisk.c b/cmd/ramdisk.c
new file mode 100644
index 0000000000..8df29729aa
--- /dev/null
+++ b/cmd/ramdisk.c
@@ -0,0 +1,92 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * ramdisk command
+ *
+ * Copyright (c) 2023, Linaro Limited
+ */
+
+#include <blk.h>
+#include <common.h>
+#include <command.h>
+#include <dm.h>
+#include <ramdisk.h>
+
+static int ramdisk_curr_dev; /* current device */
+
+static int get_desc(enum uclass_id uclass_id, int devnum, struct blk_desc
**descp)
+{
+ struct udevice *dev;
+ struct uclass *uc;
+ int ret;
+
+ *descp = NULL;
+ ret = uclass_get(UCLASS_BLK, &uc);
+ if (ret)
+ return ret;
+
+ uclass_foreach_dev(dev, uc) {
+ struct blk_desc *desc = dev_get_uclass_plat(dev);
+
+ if (desc->uclass_id == uclass_id) {
+ if (desc->devnum == devnum) {
+ *descp = desc;
+ return 0;
+ }
+ }
+ }
+
+ return -1;
+}
+
+static int do_ramdisk(struct cmd_tbl *cmdtp, int flag, int argc,
+ char *const argv[])
+{
+ int ret;
+ u64 addr, size;
+ struct udevice *dev;
+
+ if (strncmp(argv[1], "mount", 5) == 0) {
+ if (argc != 4)
+ return CMD_RET_USAGE;
+
+ addr = hextoul(argv[2], NULL);
+ size = hextoul(argv[3], NULL);
+ dev = ramdisk_mount(addr, size, NULL);
+ if (!dev)
+ return CMD_RET_FAILURE;
+
+ return CMD_RET_SUCCESS;
+ }
+
+ if (strncmp(argv[1], "umount", 6) == 0) {
+ struct blk_desc *desc;
+
+ ret = get_desc(UCLASS_RAM_DISK, ramdisk_curr_dev, &desc);
+ if (ret) {
+ printf("ramdisk device not found(dev %d)\n",
ramdisk_curr_dev);
+ return CMD_RET_FAILURE;
+ }
+
+ ret = ramdisk_unmount(desc->bdev);
+ if (ret)
+ return CMD_RET_FAILURE;
+
+ return CMD_RET_SUCCESS;
+ }
+
+ return blk_common_cmd(argc, argv, UCLASS_RAM_DISK, &ramdisk_curr_dev);
+}
+
+U_BOOT_CMD(
+ ramdisk, 5, 1, do_ramdisk,
+ "ramdisk sub-system",
+ "ramdisk info - show available ramdisk devices\n"
+ "ramdisk mount <address> <size> - mount ramdisk\n"
+ "ramdisk umount - unmount ramdisk\n"
+ "ramdisk device [dev] - show or set current device\n"
+ "ramdisk part [dev] - print partition table of one or all ramdisk
devices\n"
+ "ramdisk read addr blk# cnt - read `cnt' blocks starting at block
`blk#'\n"
+ " to memory address `addr'\n"
+ "ramdisk write addr blk# cnt - write `cnt' blocks starting at block\n"
+ " `blk#' from memory address `addr'"
+);
--
2.34.1
