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-rw-r--r--kexec/arch/mips/Makefile12
-rw-r--r--kexec/arch/mips/include/arch/options.h11
-rw-r--r--kexec/arch/mips/kexec-elf-mips.c183
-rw-r--r--kexec/arch/mips/kexec-elf-rel-mips.c42
-rw-r--r--kexec/arch/mips/kexec-mips.c188
-rw-r--r--kexec/arch/mips/kexec-mips.h17
-rw-r--r--kexec/arch/mips/mips-setup-simple.S110
7 files changed, 563 insertions, 0 deletions
diff --git a/kexec/arch/mips/Makefile b/kexec/arch/mips/Makefile
new file mode 100644
index 0000000..8cba55e
--- /dev/null
+++ b/kexec/arch/mips/Makefile
@@ -0,0 +1,12 @@
+#
+# kexec mips (linux booting linux)
+#
+mips_KEXEC_SRCS = kexec/arch/mips/kexec-mips.c
+mips_KEXEC_SRCS += kexec/arch/mips/kexec-elf-mips.c
+mips_KEXEC_SRCS += kexec/arch/mips/kexec-elf-rel-mips.c
+mips_KEXEC_SRCS += kexec/arch/mips/mips-setup-simple.S
+
+dist += kexec/arch/mips/Makefile $(mips_KEXEC_SRCS) \
+ kexec/arch/mips/kexec-mips.h \
+ kexec/arch/mips/include/arch/options.h
+
diff --git a/kexec/arch/mips/include/arch/options.h b/kexec/arch/mips/include/arch/options.h
new file mode 100644
index 0000000..bc5f706
--- /dev/null
+++ b/kexec/arch/mips/include/arch/options.h
@@ -0,0 +1,11 @@
+#ifndef KEXEC_ARCH_MIPS_OPTIONS_H
+#define KEXEC_ARCH_MIPS_OPTIONS_H
+
+#define OPT_ARCH_MAX (OPT_MAX+0)
+
+#define KEXEC_ARCH_OPTIONS \
+ KEXEC_OPTIONS \
+
+#define KEXEC_ARCH_OPT_STR KEXEC_OPT_STR ""
+
+#endif /* KEXEC_ARCH_MIPS_OPTIONS_H */
diff --git a/kexec/arch/mips/kexec-elf-mips.c b/kexec/arch/mips/kexec-elf-mips.c
new file mode 100644
index 0000000..8220829
--- /dev/null
+++ b/kexec/arch/mips/kexec-elf-mips.c
@@ -0,0 +1,183 @@
+/*
+ * kexec-elf-mips.c - kexec Elf loader for mips
+ * Copyright (C) 2007 Francesco Chiechi, Alessandro Rubini
+ * Copyright (C) 2007 Tvblob s.r.l.
+ *
+ * derived from ../ppc/kexec-elf-ppc.c
+ * Copyright (C) 2004 Albert Herranz
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2. See the file COPYING for more details.
+*/
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <elf.h>
+#include <boot/elf_boot.h>
+#include <ip_checksum.h>
+#include "../../kexec.h"
+#include "../../kexec-elf.h"
+#include "kexec-mips.h"
+#include <arch/options.h>
+
+static const int probe_debug = 0;
+
+#define BOOTLOADER "kexec"
+#define MAX_COMMAND_LINE 256
+
+#define UPSZ(X) ((sizeof(X) + 3) & ~3)
+static struct boot_notes {
+ Elf_Bhdr hdr;
+ Elf_Nhdr bl_hdr;
+ unsigned char bl_desc[UPSZ(BOOTLOADER)];
+ Elf_Nhdr blv_hdr;
+ unsigned char blv_desc[UPSZ(BOOTLOADER_VERSION)];
+ Elf_Nhdr cmd_hdr;
+ unsigned char command_line[0];
+} elf_boot_notes = {
+ .hdr = {
+ .b_signature = 0x0E1FB007,
+ .b_size = sizeof(elf_boot_notes),
+ .b_checksum = 0,
+ .b_records = 3,
+ },
+ .bl_hdr = {
+ .n_namesz = 0,
+ .n_descsz = sizeof(BOOTLOADER),
+ .n_type = EBN_BOOTLOADER_NAME,
+ },
+ .bl_desc = BOOTLOADER,
+ .blv_hdr = {
+ .n_namesz = 0,
+ .n_descsz = sizeof(BOOTLOADER_VERSION),
+ .n_type = EBN_BOOTLOADER_VERSION,
+ },
+ .blv_desc = BOOTLOADER_VERSION,
+ .cmd_hdr = {
+ .n_namesz = 0,
+ .n_descsz = 0,
+ .n_type = EBN_COMMAND_LINE,
+ },
+};
+
+
+#define OPT_APPEND (OPT_ARCH_MAX+0)
+
+int elf_mips_probe(const char *buf, off_t len)
+{
+
+ struct mem_ehdr ehdr;
+ int result;
+ result = build_elf_exec_info(buf, len, &ehdr, 0);
+ if (result < 0) {
+ goto out;
+ }
+
+ /* Verify the architecuture specific bits */
+ if (ehdr.e_machine != EM_MIPS) {
+ /* for a different architecture */
+ if (probe_debug) {
+ fprintf(stderr, "Not for this architecture.\n");
+ }
+ result = -1;
+ goto out;
+ }
+ result = 0;
+ out:
+ free_elf_info(&ehdr);
+ return result;
+}
+
+void elf_mips_usage(void)
+{
+ printf(" --command-line=STRING Set the kernel command line to "
+ "STRING.\n"
+ " --append=STRING Set the kernel command line to "
+ "STRING.\n");
+}
+
+int elf_mips_load(int argc, char **argv, const char *buf, off_t len,
+ struct kexec_info *info)
+{
+ struct mem_ehdr ehdr;
+ char *arg_buf;
+ size_t arg_bytes;
+ unsigned long arg_base;
+ struct boot_notes *notes;
+ size_t note_bytes;
+ const char *command_line;
+ int command_line_len;
+ unsigned char *setup_start;
+ uint32_t setup_size;
+ int opt;
+ static const struct option options[] = {
+ KEXEC_ARCH_OPTIONS
+ {"command-line", 1, 0, OPT_APPEND},
+ {"append", 1, 0, OPT_APPEND},
+ {0, 0, 0, 0},
+ };
+
+ static const char short_options[] = KEXEC_ARCH_OPT_STR "d";
+
+ command_line = 0;
+ while ((opt = getopt_long(argc, argv, short_options,
+ options, 0)) != -1) {
+ switch (opt) {
+ default:
+ /* Ignore core options */
+ if (opt < OPT_ARCH_MAX) {
+ break;
+ }
+ case '?':
+ usage();
+ return -1;
+ case OPT_APPEND:
+ command_line = optarg;
+ break;
+ }
+ }
+ command_line_len = 0;
+ setup_simple_regs.spr9 = 0;
+ if (command_line) {
+ command_line_len = strlen(command_line) + 1;
+ setup_simple_regs.spr9 = 2;
+ }
+
+ /* Load the ELF executable */
+ elf_exec_build_load(info, &ehdr, buf, len, 0);
+
+ setup_start = setup_simple_start;
+ setup_size = setup_simple_size;
+ setup_simple_regs.spr8 = ehdr.e_entry;
+
+ note_bytes = sizeof(elf_boot_notes) + ((command_line_len + 3) & ~3);
+ arg_bytes = note_bytes + ((setup_size + 3) & ~3);
+
+ arg_buf = xmalloc(arg_bytes);
+ arg_base = add_buffer_virt(info,
+ arg_buf, arg_bytes, arg_bytes, 4, 0, elf_max_addr(&ehdr), 1);
+
+ notes = (struct boot_notes *)(arg_buf + ((setup_size + 3) & ~3));
+
+ memcpy(arg_buf, setup_start, setup_size);
+ memcpy(notes, &elf_boot_notes, sizeof(elf_boot_notes));
+ memcpy(notes->command_line, command_line, command_line_len);
+
+ notes->hdr.b_size = note_bytes;
+ notes->cmd_hdr.n_descsz = command_line_len;
+ notes->hdr.b_checksum = compute_ip_checksum(notes, note_bytes);
+
+ info->entry = (void *)arg_base;
+
+ return 0;
+}
+
diff --git a/kexec/arch/mips/kexec-elf-rel-mips.c b/kexec/arch/mips/kexec-elf-rel-mips.c
new file mode 100644
index 0000000..6442fb9
--- /dev/null
+++ b/kexec/arch/mips/kexec-elf-rel-mips.c
@@ -0,0 +1,42 @@
+/*
+ * kexec-elf-rel-mips.c - kexec Elf relocation routines
+ * Copyright (C) 2007 Francesco Chiechi, Alessandro Rubini
+ * Copyright (C) 2007 Tvblob s.r.l.
+ *
+ * derived from ../ppc/kexec-elf-rel-ppc.c
+ * Copyright (C) 2004 Albert Herranz
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2. See the file COPYING for more details.
+*/
+
+#include <stdio.h>
+#include <elf.h>
+#include "../../kexec.h"
+#include "../../kexec-elf.h"
+
+int machine_verify_elf_rel(struct mem_ehdr *ehdr)
+{
+ if (ehdr->ei_data != ELFDATA2MSB) {
+ return 0;
+ }
+ if (ehdr->ei_class != ELFCLASS32) {
+ return 0;
+ }
+ if (ehdr->e_machine != EM_MIPS) {
+ return 0;
+ }
+ return 1;
+}
+
+void machine_apply_elf_rel(struct mem_ehdr *ehdr, unsigned long r_type,
+ void *location, unsigned long address, unsigned long value)
+{
+ switch(r_type) {
+
+ default:
+ die("Unknown rela relocation: %lu\n", r_type);
+ break;
+ }
+ return;
+}
diff --git a/kexec/arch/mips/kexec-mips.c b/kexec/arch/mips/kexec-mips.c
new file mode 100644
index 0000000..b17a20b
--- /dev/null
+++ b/kexec/arch/mips/kexec-mips.c
@@ -0,0 +1,188 @@
+/*
+ * kexec-mips.c - kexec for mips
+ * Copyright (C) 2007 Francesco Chiechi, Alessandro Rubini
+ * Copyright (C) 2007 Tvblob s.r.l.
+ *
+ * derived from ../ppc/kexec-mips.c
+ * Copyright (C) 2004, 2005 Albert Herranz
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2. See the file COPYING for more details.
+ */
+
+#include <stddef.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdint.h>
+#include <string.h>
+#include <getopt.h>
+#include <sys/utsname.h>
+#include "../../kexec.h"
+#include "../../kexec-syscall.h"
+#include "kexec-mips.h"
+#include <arch/options.h>
+
+#define MAX_MEMORY_RANGES 64
+#define MAX_LINE 160
+static struct memory_range memory_range[MAX_MEMORY_RANGES];
+
+/* Return a sorted list of memory ranges. */
+int get_memory_ranges(struct memory_range **range, int *ranges, unsigned long kexec_flags)
+{
+ int memory_ranges = 0;
+
+#if 1
+ /* this is valid for gemini2 platform based on tx4938
+ * in our case, /proc/iomem doesn't report ram space
+ */
+ memory_range[memory_ranges].start = 0x00000000;
+ memory_range[memory_ranges].end = 0x04000000;
+ memory_range[memory_ranges].type = RANGE_RAM;
+ memory_ranges++;
+#else
+#error Please, fix this for your platform
+ const char iomem[] = "/proc/iomem";
+ char line[MAX_LINE];
+ FILE *fp;
+ unsigned long long start, end;
+ char *str;
+ int type, consumed, count;
+
+ fp = fopen(iomem, "r");
+ if (!fp) {
+ fprintf(stderr, "Cannot open %s: %s\n", iomem, strerror(errno));
+ return -1;
+ }
+ while (fgets(line, sizeof(line), fp) != 0) {
+ if (memory_ranges >= MAX_MEMORY_RANGES)
+ break;
+ count = sscanf(line, "%Lx-%Lx : %n", &start, &end, &consumed);
+ if (count != 2)
+ continue;
+ str = line + consumed;
+ end = end + 1;
+#if 0
+ printf("%016Lx-%016Lx : %s\n", start, end, str);
+#endif
+ if (memcmp(str, "System RAM\n", 11) == 0) {
+ type = RANGE_RAM;
+ } else if (memcmp(str, "reserved\n", 9) == 0) {
+ type = RANGE_RESERVED;
+ } else if (memcmp(str, "ACPI Tables\n", 12) == 0) {
+ type = RANGE_ACPI;
+ } else if (memcmp(str, "ACPI Non-volatile Storage\n", 26) == 0) {
+ type = RANGE_ACPI_NVS;
+ } else {
+ continue;
+ }
+ memory_range[memory_ranges].start = start;
+ memory_range[memory_ranges].end = end;
+ memory_range[memory_ranges].type = type;
+#if 0
+ printf("%016Lx-%016Lx : %x\n", start, end, type);
+#endif
+ memory_ranges++;
+ }
+ fclose(fp);
+#endif
+
+ *range = memory_range;
+ *ranges = memory_ranges;
+ return 0;
+}
+
+struct file_type file_type[] = {
+ {"elf-mips", elf_mips_probe, elf_mips_load, elf_mips_usage},
+};
+int file_types = sizeof(file_type) / sizeof(file_type[0]);
+
+void arch_usage(void)
+{
+}
+
+int arch_process_options(int argc, char **argv)
+{
+ static const struct option options[] = {
+ KEXEC_ARCH_OPTIONS
+ { 0, 0, NULL, 0 },
+ };
+ static const char short_options[] = KEXEC_ARCH_OPT_STR;
+ int opt;
+
+ opterr = 0; /* Don't complain about unrecognized options here */
+ while((opt = getopt_long(argc, argv, short_options, options, 0)) != -1) {
+ switch(opt) {
+ default:
+ break;
+ }
+ }
+ /* Reset getopt for the next pass; called in other source modules */
+ opterr = 1;
+ optind = 1;
+ return 0;
+}
+
+int arch_compat_trampoline(struct kexec_info *info)
+{
+ int result;
+ struct utsname utsname;
+ result = uname(&utsname);
+ if (result < 0) {
+ fprintf(stderr, "uname failed: %s\n",
+ strerror(errno));
+ return -1;
+ }
+ if (strcmp(utsname.machine, "mips") == 0)
+ {
+ /* For compatibility with older patches
+ * use KEXEC_ARCH_DEFAULT instead of KEXEC_ARCH_MIPS here.
+ */
+ info->kexec_flags |= KEXEC_ARCH_DEFAULT;
+ }
+ else {
+ fprintf(stderr, "Unsupported machine type: %s\n",
+ utsname.machine);
+ return -1;
+ }
+ return 0;
+}
+
+void arch_update_purgatory(struct kexec_info *info)
+{
+}
+
+/*
+ * Adding a dummy function, so that build on mips will not break.
+ * Need to implement the actual checking code
+ */
+int is_crashkernel_mem_reserved(void)
+{
+ return 1;
+}
+
+unsigned long virt_to_phys(unsigned long addr)
+{
+ return addr - 0x80000000;
+}
+
+/*
+ * add_segment() should convert base to a physical address on mips,
+ * while the default is just to work with base as is */
+void add_segment(struct kexec_info *info, const void *buf, size_t bufsz,
+ unsigned long base, size_t memsz)
+{
+ add_segment_phys_virt(info, buf, bufsz, base, memsz, 1);
+}
+
+/*
+ * add_buffer() should convert base to a physical address on mips,
+ * while the default is just to work with base as is */
+unsigned long add_buffer(struct kexec_info *info, const void *buf,
+ unsigned long bufsz, unsigned long memsz,
+ unsigned long buf_align, unsigned long buf_min,
+ unsigned long buf_max, int buf_end)
+{
+ return add_buffer_phys_virt(info, buf, bufsz, memsz, buf_align,
+ buf_min, buf_max, buf_end, 1);
+}
+
diff --git a/kexec/arch/mips/kexec-mips.h b/kexec/arch/mips/kexec-mips.h
new file mode 100644
index 0000000..13f82be
--- /dev/null
+++ b/kexec/arch/mips/kexec-mips.h
@@ -0,0 +1,17 @@
+#ifndef KEXEC_MIPS_H
+#define KEXEC_MIPS_H
+
+extern unsigned char setup_simple_start[];
+extern uint32_t setup_simple_size;
+
+extern struct {
+ uint32_t spr8;
+ uint32_t spr9;
+} setup_simple_regs;
+
+int elf_mips_probe(const char *buf, off_t len);
+int elf_mips_load(int argc, char **argv, const char *buf, off_t len,
+ struct kexec_info *info);
+void elf_mips_usage(void);
+
+#endif /* KEXEC_MIPS_H */
diff --git a/kexec/arch/mips/mips-setup-simple.S b/kexec/arch/mips/mips-setup-simple.S
new file mode 100644
index 0000000..1acdee3
--- /dev/null
+++ b/kexec/arch/mips/mips-setup-simple.S
@@ -0,0 +1,110 @@
+/*
+ * mips-setup-simple.S - code to execute before kernel to handle command line
+ * Copyright (C) 2007 Francesco Chiechi, Alessandro Rubini
+ * Copyright (C) 2007 Tvblob s.r.l.
+ *
+ * derived from Albert Herranz idea (ppc) adding command line support
+ * (boot_notes structure)
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2. See the file COPYING for more details.
+ */
+
+/*
+ * Only suitable for platforms booting with MMU turned off.
+ * -- Albert Herranz
+ */
+#include "regdef.h"
+
+/* returns t0 = relocated address of sym */
+/* modifies t1 t2 */
+/* sym must not be global or this will not work (at least AFAIK up to now) */
+#define RELOC_SYM(sym) \
+ move t0,ra; /* save ra */ \
+ bal 1f; \
+1: \
+ move t1,ra; /* now t1 is 1b (where we are now) */ \
+ move ra,t0; /* restore ra */ \
+ lui t2,%hi(1b); \
+ ori t2,t2,%lo(1b); \
+ lui t0,%hi(sym); \
+ ori t0,t0,%lo(sym); \
+ sub t0,t0,t2; /* t0 = offset between sym and 1b */ \
+ add t0,t1,t0; /* t0 = actual address in memory */
+
+ .data
+ .globl setup_simple_start
+setup_simple_start:
+
+ /* should perform here any required setup */
+
+ /* Initialize GOT pointer (verify if needed) */
+ bal 1f
+ nop
+ .word _GLOBAL_OFFSET_TABLE_
+ 1:
+ move gp, ra
+ lw t1, 0(ra)
+ move gp, t1
+
+ /* spr8 relocation */
+ RELOC_SYM(spr8)
+
+ move t4,t0 // save pointer to kernel start addr
+ lw t3,0(t0) // save kernel start address
+
+ /* spr9 relocation */
+ RELOC_SYM(spr9)
+ lw a0,0(t0) // load argc
+
+ // this code is to be changed if boot_notes struct changes
+ lw t2,12(t4) // t2 is size of boot_notes struct
+ addi t2,t2,3
+ srl t2,t2,2
+ sll v1,t2,2 // v1 = size of boot_notes struct
+ // aligned to word boundary
+
+ addi t0,t4,0x20 // t0 contains the address of "kexec" string
+ add v0,t4,v1 // v0 points to last word of boot_notes
+ addi v0,v0,8 // v0 points to address after boot_notes
+ sw t0,0(v0) // store pointer to "kexec" string there
+
+ lw t2,-8(t0) // t2 is size of "kexec" string in bytes
+ addi t2,t2,3
+ srl t2,t2,2
+ sll v1,t2,2 // v1 = size of "kexec" string
+ // aligned to word boundary
+ add t2,t0,v1
+ addi t0,t2,4 // t0 points to size of version string
+
+ lw t2,0(t0) // t2 is size of version string in bytes
+ addi t2,t2,3
+ srl t2,t2,2
+ sll v1,t2,2 // v1 = size of version string
+ // aligned to word boundary
+
+ addi t0,t0,8 // t0 points to version string
+ add t0,t0,v1 // t0 points to start of command_line record
+ addi t0,t0,12 // t0 points command line
+
+ sw t0,4(v0) // store pointer to command line
+
+ move a1,v0 // load argv
+ li a2,0
+ li a3,0
+
+ jr t3
+ nop
+
+ .balign 4
+ .globl setup_simple_regs
+setup_simple_regs:
+spr8: .long 0x00000000
+spr9: .long 0x00000000
+
+setup_simple_end:
+
+ .globl setup_simple_size
+setup_simple_size:
+ .long setup_simple_end - setup_simple_start
+
generated by cgit (git 2.34.1) at 2025-07-16 17:48:57 +0000