This patch adds booti support for RISC-V Linux kernel. The existing
bootm method will also continue to work as it is.
It depends on the following kernel patch which adds the header to the
flat Image. Gzip compressed Image (Image.gz) support is not enabled with
this patch.
https://patchwork.kernel.org/patch/10925543/
Tested on HiFive Unleashed and QEMU.
Signed-off-by: Atish Patra
--
Changes from v2->v3
1. Updated the image header structure as per kernel patch.
2. Removed Image.gz support as it will be added as separate RFC patch.
---
arch/riscv/lib/Makefile | 1 +
arch/riscv/lib/image.c | 55 +
cmd/Kconfig | 2 +-
cmd/booti.c | 8 --
4 files changed, 63 insertions(+), 3 deletions(-)
create mode 100644 arch/riscv/lib/image.c
diff --git a/arch/riscv/lib/Makefile b/arch/riscv/lib/Makefile
index 1c332db436a9..6ae6ebbeafda 100644
--- a/arch/riscv/lib/Makefile
+++ b/arch/riscv/lib/Makefile
@@ -7,6 +7,7 @@
# Rick Chen, Andes Technology Corporation
obj-$(CONFIG_CMD_BOOTM) += bootm.o
+obj-$(CONFIG_CMD_BOOTI) += bootm.o image.o
obj-$(CONFIG_CMD_GO) += boot.o
obj-y += cache.o
obj-$(CONFIG_RISCV_RDTIME) += rdtime.o
diff --git a/arch/riscv/lib/image.c b/arch/riscv/lib/image.c
new file mode 100644
index ..d063beb7dfbe
--- /dev/null
+++ b/arch/riscv/lib/image.c
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Western Digital Corporation or its affiliates.
+ * Authors:
+ * Atish Patra
+ * Based on arm/lib/image.c
+ */
+
+#include
+#include
+#include
+#include
+#include
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* ASCII version of "RISCV" defined in Linux kernel */
+#define LINUX_RISCV_IMAGE_MAGIC 0x5643534952
+
+struct linux_image_h {
+ uint32_tcode0; /* Executable code */
+ uint32_tcode1; /* Executable code */
+ uint64_ttext_offset;/* Image load offset */
+ uint64_timage_size; /* Effective Image size */
+ uint64_tres1; /* reserved */
+ uint64_tres2; /* reserved */
+ uint64_tres3; /* reserved */
+ uint64_tmagic; /* Magic number */
+ uint32_tres4; /* reserved */
+ uint32_tres5; /* reserved */
+};
+
+int booti_setup(ulong image, ulong *relocated_addr, ulong *size,
+ bool force_reloc)
+{
+ struct linux_image_h *lhdr;
+
+ lhdr = (struct linux_image_h *)map_sysmem(image, 0);
+
+ if (lhdr->magic != LINUX_RISCV_IMAGE_MAGIC) {
+ puts("Bad Linux RISCV Image magic!\n");
+ return -EINVAL;
+ }
+
+ if (lhdr->image_size == 0) {
+ puts("Image lacks image_size field, error!\n");
+ return -EINVAL;
+ }
+ *size = lhdr->image_size;
+ *relocated_addr = gd->ram_base + lhdr->text_offset;
+
+ unmap_sysmem(lhdr);
+
+ return 0;
+}
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 2bdbfcb3d091..d427b66d3714 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -212,7 +212,7 @@ config CMD_BOOTZ
config CMD_BOOTI
bool "booti"
- depends on ARM64
+ depends on ARM64 || RISCV
default y
help
Boot an AArch64 Linux Kernel image from memory.
diff --git a/cmd/booti.c b/cmd/booti.c
index 04353b68eccc..c22ba9bae2e4 100644
--- a/cmd/booti.c
+++ b/cmd/booti.c
@@ -77,7 +77,11 @@ int do_booti(cmd_tbl_t *cmdtp, int flag, int argc, char *
const argv[])
bootm_disable_interrupts();
images.os.os = IH_OS_LINUX;
+ #ifdef CONFIG_RISCV_SMODE
+ images.os.arch = IH_ARCH_RISCV;
+ #elif CONFIG_ARM64
images.os.arch = IH_ARCH_ARM64;
+ #endif
ret = do_bootm_states(cmdtp, flag, argc, argv,
#ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
BOOTM_STATE_RAMDISK |
@@ -92,7 +96,7 @@ int do_booti(cmd_tbl_t *cmdtp, int flag, int argc, char *
const argv[])
#ifdef CONFIG_SYS_LONGHELP
static char booti_help_text[] =
"[addr [initrd[:size]] [fdt]]\n"
- "- boot arm64 Linux Image stored in memory\n"
+ "- boot arm64/riscv Linux Image stored in memory\n"
"\tThe argument 'initrd' is optional and specifies the address\n"
"\tof an initrd in memory. The optional parameter ':size' allows\n"
"\tspecifying the size of a RAW initrd.\n"
@@ -107,5 +111,5 @@ static char booti_help_text[] =
U_BOOT_CMD(
booti, CONFIG_SYS_MAXARGS, 1, do_booti,
- "boot arm64 Linux Image image from memory", booti_help_text
+ "boot arm64/riscv Linux Image image from memory", booti_help_text
);
--
2.21.0
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