From 394e3a8d37801b499e5bc5c87718848356611f79 Mon Sep 17 00:00:00 2001
From: Hamish Guthrie <hcg@openwrt.org>
Date: Thu, 11 Dec 2008 15:52:28 +0000
Subject: Add kexec load legacy kernel patch
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13598 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
.../0005-ps3-kexec-load-legacy-kernel-hack.patch | 187 +++++++++++++++++++++
1 file changed, 187 insertions(+)
create mode 100644 package/kexec-tools/patches/0005-ps3-kexec-load-legacy-kernel-hack.patch
diff --git a/package/kexec-tools/patches/0005-ps3-kexec-load-legacy-kernel-hack.patch b/package/kexec-tools/patches/0005-ps3-kexec-load-legacy-kernel-hack.patch
new file mode 100644
index 0000000000..6b7b37681d
--- /dev/null
+++ b/package/kexec-tools/patches/0005-ps3-kexec-load-legacy-kernel-hack.patch
@@ -0,0 +1,187 @@
+Hack to load PS3 legacy kernels (2.6.16 and fc7 installer) with the 2.6.23
+mainline linux kernel.
+
+---
+ kexec/arch/ppc64/fs2dt.c | 47 +++++++++++++++++++++++++++++++++++++
+ kexec/arch/ppc64/kexec-elf-ppc64.c | 44 ++++++++++++++++++++++++++++++++++
+ kexec/arch/ppc64/kexec-ppc64.c | 5 +++
+ kexec/arch/ppc64/kexec-ppc64.h | 2 +
+ 4 files changed, 98 insertions(+)
+
+--- a/kexec/arch/ppc64/fs2dt.c
++++ b/kexec/arch/ppc64/fs2dt.c
+@@ -262,6 +262,33 @@ static void putprops(char *fn, struct di
+ die("unrecoverable error: could not read \"%s\": %s\n",
+ pathname, strerror(errno));
+
++ /* ps3 legacy - Add 'PS3PF' to compatible */
++
++ if (ps3_legacy && !strcmp(dp->d_name, "compatible")) {
++ static const char s[] = "PS3PF";
++ char *const tmp = (char *)dt + len;
++
++ memcpy(tmp, s, sizeof(s));
++ len += sizeof(s);
++ *dt_len = len;
++
++ fprintf(stdout, "ps3 legacy: Changed dt entry "
++ "/compatible: <%s> -> <%s %s>\n",
++ (char *)dt, (char *)dt, tmp);
++ }
++
++ /* ps3 legacy - force memory.reg to 224 MiB */
++
++ if (ps3_legacy && !strcmp(dp->d_name, "reg") && len == 16) {
++ uint64_t tmp = *((uint64_t *)dt + 1);
++
++ *((uint64_t *)dt + 1) = 0xe000000ULL;
++ fprintf(stdout, "ps3 legacy: Changed dt entry "
++ "/memory/reg: <%llx> -> <%llx>\n",
++ (unsigned long long)tmp,
++ *((unsigned long long *)dt + 1));
++ }
++
+ checkprop(fn, dt, len);
+
+ dt += (len + 3)/4;
+@@ -360,6 +387,26 @@ static void putnode(void)
+ reserve(initrd_base, initrd_size);
+ }
+
++ /* ps3 legacy - add entry linux,platform <801> */
++
++ if (ps3_legacy && !strcmp(basename,"/chosen/")) {
++ int len = 4;
++ static const uint32_t data = 0x801UL;
++
++ *dt++ = 3;
++ *dt++ = len;
++ *dt++ = propnum("linux,platform");
++
++ if ((len >= 8) && ((unsigned long)dt & 0x4))
++ dt++;
++
++ memcpy(dt,&data,len);
++ dt += (len + 3)/4;
++
++ fprintf(stdout, "ps3 legacy: Added dt entry "
++ "/chosen/linux,platform = <801>\n");
++ }
++
+ /* Add cmdline to the second kernel. Check to see if the new
+ * cmdline has a root=. If not, use the old root= cmdline. */
+ if (!strcmp(basename,"/chosen/")) {
+--- a/kexec/arch/ppc64/kexec-elf-ppc64.c
++++ b/kexec/arch/ppc64/kexec-elf-ppc64.c
+@@ -45,6 +45,7 @@
+ uint64_t initrd_base, initrd_size;
+ unsigned char reuse_initrd = 0;
+ const char *ramdisk;
++int ps3_legacy = -1; /* default to probe */
+
+ int create_flatten_tree(struct kexec_info *, unsigned char **, unsigned long *,
+ char *);
+@@ -76,6 +77,33 @@ void arch_reuse_initrd(void)
+ reuse_initrd = 1;
+ }
+
++/**
++ * ps3_legacy_probe - Probe kernel version.
++ */
++
++static int ps3_legacy_probe(const char *p, off_t len)
++{
++ static const char d1[] = "linux,platform"; /* legacy 2.6.16 */
++ static const char d2[] = "2.6.21-1.3194.fc7"; /* fedora 7 installer */
++ const char *const end = p + len - sizeof(d2);
++
++ while(p < end) {
++ if (p[0] == d1[0] && !memcmp(p, d1, sizeof(d1) - 1)) {
++ fprintf(stdout, "ps3 legacy: Legacy kernel found: "
++ "'%s'\n", d1);
++ break;
++ }
++ if (p[0] == d2[0] && !memcmp(p, d2, sizeof(d2) - 1)) {
++ fprintf(stdout, "ps3 legacy: Legacy kernel found: "
++ "'%s'\n", d2);
++ break;
++ }
++ p++;
++ }
++
++ return (p != end);
++}
++
+ int elf_ppc64_load(int argc, char **argv, const char *buf, off_t len,
+ struct kexec_info *info)
+ {
+@@ -102,6 +130,8 @@ int elf_ppc64_load(int argc, char **argv
+ #define OPT_RAMDISK (OPT_ARCH_MAX+1)
+ #define OPT_DEVICETREEBLOB (OPT_ARCH_MAX+2)
+ #define OPT_ARGS_IGNORE (OPT_ARCH_MAX+3)
++#define OPT_PS3_LEGACY (OPT_ARCH_MAX+4)
++#define OPT_PS3_LEGACY_NO (OPT_ARCH_MAX+5)
+
+ static const struct option options[] = {
+ KEXEC_ARCH_OPTIONS
+@@ -111,6 +141,8 @@ int elf_ppc64_load(int argc, char **argv
+ { "initrd", 1, NULL, OPT_RAMDISK },
+ { "devicetreeblob", 1, NULL, OPT_DEVICETREEBLOB },
+ { "args-linux", 0, NULL, OPT_ARGS_IGNORE },
++ { "ps3-legacy", 0, NULL, OPT_PS3_LEGACY },
++ { "ps3-no-legacy", 0, NULL, OPT_PS3_LEGACY_NO },
+ { 0, 0, NULL, 0 },
+ };
+
+@@ -146,9 +178,18 @@ int elf_ppc64_load(int argc, char **argv
+ break;
+ case OPT_ARGS_IGNORE:
+ break;
++ case OPT_PS3_LEGACY:
++ ps3_legacy = 1;
++ break;
++ case OPT_PS3_LEGACY_NO:
++ ps3_legacy = 0;
++ break;
+ }
+ }
+
++ if (ps3_legacy == -1)
++ ps3_legacy = ps3_legacy_probe(buf, len);
++
+ cmdline_len = 0;
+ if (cmdline)
+ cmdline_len = strlen(cmdline) + 1;
+@@ -158,6 +199,9 @@ int elf_ppc64_load(int argc, char **argv
+ if (ramdisk && reuse_initrd)
+ die("Can't specify --ramdisk or --initrd with --reuseinitrd\n");
+
++ if (ps3_legacy && devicetreeblob)
++ die("Can't specify --devicetreeblob with --ps3-legacy\n");
++
+ setup_memory_ranges(info->kexec_flags);
+
+ /* Need to append some command line parameters internally in case of
+--- a/kexec/arch/ppc64/kexec-ppc64.c
++++ b/kexec/arch/ppc64/kexec-ppc64.c
+@@ -650,6 +650,11 @@ void arch_usage(void)
+ fprintf(stderr, " --initrd=<filename> same as --ramdisk.\n");
+ fprintf(stderr, " --devicetreeblob=<filename> Specify device tree blob file.\n");
+ fprintf(stderr, " --elf64-core-headers Prepare core headers in ELF64 format\n");
++ fprintf(stderr, " --ps3-legacy Make fixups needed to boot PS3 legacy kernels.\n");
++ fprintf(stderr, " The default is to probe the kernel type.\n");
++ fprintf(stderr, " --ps3-no-legacy Do not make fixups needed to boot PS3 legacy\n");
++ fprintf(stderr, " kernels. The default is to probe the kernel\n");
++ fprintf(stderr, " type.\n");
+ }
+
+ struct arch_options_t arch_options = {
+--- a/kexec/arch/ppc64/kexec-ppc64.h
++++ b/kexec/arch/ppc64/kexec-ppc64.h
+@@ -41,4 +41,6 @@ typedef struct mem_rgns {
+
+ extern mem_rgns_t usablemem_rgns;
+
++extern int ps3_legacy;
++
+ #endif /* KEXEC_PPC64_H */
--
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