Commit 315bb968 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: CPU flags in AT_HWCAP in ELF auxvt. 



Encode processor flags in AT_HWCAP in the ELF auxiliary vector.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent a6a31139

arch/sh/kernel/cpu/sh4/probe.c

+5 −3
Original line number Diff line number Diff line
@@ -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;

}

include/asm-sh/cpu-features.h

0 → 100644
+15 −0
Original line number Diff line number Diff line 
#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 */

include/asm-sh/elf.h

+6 −4
Original line number Diff line number Diff line 
#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

include/asm-sh/processor.h

+1 −11
Original line number Diff line number Diff line
@@ -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;