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authorNathan Lynch <ntl@pobox.com>2008-07-15 19:58:51 -0400
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-07-25 01:44:39 -0400
commit9115d13453dee22473a1e8cacc90a8d64a9c4bc9 (patch)
treedc6c7b1aad8861ae5f88aaf496fd634338686330 /include/asm-powerpc
parent483fad1c3fa1060d7e6710e84a065ad514571739 (diff)
powerpc: Enable AT_BASE_PLATFORM aux vector
Stash the first platform string matched by identify_cpu() in powerpc_base_platform, and supply that to the ELF loader for the value of AT_BASE_PLATFORM. Signed-off-by: Nathan Lynch <ntl@pobox.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'include/asm-powerpc')
-rw-r--r--include/asm-powerpc/cputable.h2
-rw-r--r--include/asm-powerpc/elf.h8
2 files changed, 10 insertions, 0 deletions
diff --git a/include/asm-powerpc/cputable.h b/include/asm-powerpc/cputable.h
index 2a3e9075a5a0..ef8a248dfd55 100644
--- a/include/asm-powerpc/cputable.h
+++ b/include/asm-powerpc/cputable.h
@@ -127,6 +127,8 @@ extern struct cpu_spec *identify_cpu(unsigned long offset, unsigned int pvr);
127extern void do_feature_fixups(unsigned long value, void *fixup_start, 127extern void do_feature_fixups(unsigned long value, void *fixup_start,
128 void *fixup_end); 128 void *fixup_end);
129 129
130extern const char *powerpc_base_platform;
131
130#endif /* __ASSEMBLY__ */ 132#endif /* __ASSEMBLY__ */
131 133
132/* CPU kernel features */ 134/* CPU kernel features */
diff --git a/include/asm-powerpc/elf.h b/include/asm-powerpc/elf.h
index 89664675b469..80d1f399ee51 100644
--- a/include/asm-powerpc/elf.h
+++ b/include/asm-powerpc/elf.h
@@ -217,6 +217,14 @@ typedef elf_vrregset_t elf_fpxregset_t;
217 217
218#define ELF_PLATFORM (cur_cpu_spec->platform) 218#define ELF_PLATFORM (cur_cpu_spec->platform)
219 219
220/* While ELF_PLATFORM indicates the ISA supported by the platform, it
221 * may not accurately reflect the underlying behavior of the hardware
222 * (as in the case of running in Power5+ compatibility mode on a
223 * Power6 machine). ELF_BASE_PLATFORM allows ld.so to load libraries
224 * that are tuned for the real hardware.
225 */
226#define ELF_BASE_PLATFORM (powerpc_base_platform)
227
220#ifdef __powerpc64__ 228#ifdef __powerpc64__
221# define ELF_PLAT_INIT(_r, load_addr) do { \ 229# define ELF_PLAT_INIT(_r, load_addr) do { \
222 _r->gpr[2] = load_addr; \ 230 _r->gpr[2] = load_addr; \