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sh: CPU flags in AT_HWCAP in ELF auxvt. 

Encode processor flags in AT_HWCAP in the ELF auxiliary vector.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2006-09-27 18:22:53 +09:00
parent a6a3113989
commit 315bb96824
4 changed files with 27 additions and 18 deletions
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8
arch/sh/kernel/cpu/sh4/probe.c
View File

@ -76,6 +76,7 @@ int __init detect_cpu_and_cache_system(void)
cpu_data->type = CPU_SH73180;
cpu_data->icache.ways = 4;
cpu_data->dcache.ways = 4;
cpu_data->flags |= CPU_HAS_LLSC;
break;
case 0x2001:
case 0x2004:
@ -83,7 +84,7 @@ int __init detect_cpu_and_cache_system(void)
cpu_data->icache.ways = 4;
cpu_data->dcache.ways = 4;
cpu_data->flags |= CPU_HAS_FPU;
cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_LLSC;
break;
case 0x2006:
case 0x200A:
@ -95,13 +96,15 @@ int __init detect_cpu_and_cache_system(void)
cpu_data->icache.ways = 4;
cpu_data->dcache.ways = 4;
cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_PERF_COUNTER;
cpu_data->flags |= CPU_HAS_FPU | CPU_HAS_PERF_COUNTER |
CPU_HAS_LLSC;
break;
case 0x3000:
case 0x3003:
cpu_data->type = CPU_SH7343;
cpu_data->icache.ways = 4;
cpu_data->dcache.ways = 4;
cpu_data->flags |= CPU_HAS_LLSC;
break;
case 0x8000:
cpu_data->type = CPU_ST40RA;
@ -180,4 +183,3 @@ int __init detect_cpu_and_cache_system(void)
return 0;
}

15
include/asm-sh/cpu-features.h Normal file
View File

@ -0,0 +1,15 @@
#ifndef __ASM_SH_CPU_FEATURES_H
#define __ASM_SH_CPU_FEATURES_H
/*
* Processor flags
*/
#define CPU_HAS_FPU 0x0001 /* Hardware FPU support */
#define CPU_HAS_P2_FLUSH_BUG 0x0002 /* Need to flush the cache in P2 area */
#define CPU_HAS_MMU_PAGE_ASSOC 0x0004 /* SH3: TLB way selection bit support */
#define CPU_HAS_DSP 0x0008 /* SH-DSP: DSP support */
#define CPU_HAS_PERF_COUNTER 0x0010 /* Hardware performance counters */
#define CPU_HAS_PTEA 0x0020 /* PTEA register */
#define CPU_HAS_LLSC 0x0040 /* movli.l/movco.l */
#endif /* __ASM_SH_CPU_FEATURES_H */

10
include/asm-sh/elf.h
View File

@ -1,6 +1,11 @@
#ifndef __ASM_SH_ELF_H
#define __ASM_SH_ELF_H
#include <asm/processor.h>
#include <asm/auxvec.h>
#include <asm/ptrace.h>
#include <asm/user.h>
/* SH relocation types */
#define R_SH_NONE 0
#define R_SH_DIR32 1
@ -46,9 +51,6 @@
* ELF register definitions..
*/
#include <asm/ptrace.h>
#include <asm/user.h>
typedef unsigned long elf_greg_t;
#define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
@ -91,7 +93,7 @@ typedef struct user_fpu_struct elf_fpregset_t;
instruction set this CPU supports. This could be done in user space,
but it's not easy, and we've already done it here. */
#define ELF_HWCAP (0)
#define ELF_HWCAP (boot_cpu_data.flags)
/* This yields a string that ld.so will use to load implementation
specific libraries for optimization. This is more specific in

12
include/asm-sh/processor.h
View File

@ -14,6 +14,7 @@
#include <asm/types.h>
#include <asm/cache.h>
#include <asm/ptrace.h>
#include <asm/cpu-features.h>
/*
* Default implementation of macro that returns current
@ -127,17 +128,6 @@ union sh_fpu_union {
struct sh_fpu_soft_struct soft;
};
/*
* Processor flags
*/
#define CPU_HAS_FPU 0x0001 /* Hardware FPU support */
#define CPU_HAS_P2_FLUSH_BUG 0x0002 /* Need to flush the cache in P2 area */
#define CPU_HAS_MMU_PAGE_ASSOC 0x0004 /* SH3: TLB way selection bit support */
#define CPU_HAS_DSP 0x0008 /* SH-DSP: DSP support */
#define CPU_HAS_PERF_COUNTER 0x0010 /* Hardware performance counters */
#define CPU_HAS_PTEA 0x0020 /* PTEA register */
struct thread_struct {
unsigned long sp;
unsigned long pc;