This introcudes the ramdisk command, to control the ramdisk devices.
Signed-off-by: Masahisa Kojima masahisa.kojima@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'" +);