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MIPS: Move cop2 save/restore to switch_to()

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Move the common code for saving and restoring platform specific COP2
registers to switch_to(). This will make supporting new platforms (like
Netlogic XLP) easier.

The platform specific COP2 definitions are to be specified in
asm/processor.h and in asm/cop2.h.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Cc: ddaney.cavm@gmail.com
Patchwork: https://patchwork.linux-mips.org/patch/5411/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Jayachandran C
2013-06-10 06:30:00 +00:00
committed by Ralf Baechle
parent 79f8511c83
commit 2c952e06e4
4 changed files with 44 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
arch/mips/include/asm/processor.h
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@@ -137,7 +137,7 @@ union mips_watch_reg_state {
struct mips3264_watch_reg_state mips3264;
};
#ifdef CONFIG_CPU_CAVIUM_OCTEON
#if defined(CONFIG_CPU_CAVIUM_OCTEON)
struct octeon_cop2_state {
/* DMFC2 rt, 0x0201 */
@@ -182,13 +182,16 @@ struct octeon_cop2_state {
/* DMFC2 rt, 0x025A; DMFC2 rt, 0x025B - Pass2 */
unsigned long cop2_gfm_result[2];
};
#define INIT_OCTEON_COP2 {0,}
#define COP2_INIT \
.cp2 = {0,},
struct octeon_cvmseg_state {
unsigned long cvmseg[CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE]
[cpu_dcache_line_size() / sizeof(unsigned long)];
};
#else
#define COP2_INIT
#endif
typedef struct {
@@ -245,13 +248,6 @@ struct thread_struct {
#define FPAFF_INIT
#endif /* CONFIG_MIPS_MT_FPAFF */
#ifdef CONFIG_CPU_CAVIUM_OCTEON
#define OCTEON_INIT \
.cp2 = INIT_OCTEON_COP2,
#else
#define OCTEON_INIT
#endif /* CONFIG_CPU_CAVIUM_OCTEON */
#define INIT_THREAD { \
/* \
* Saved main processor registers \
@@ -300,9 +296,9 @@ struct thread_struct {
.cp0_baduaddr = 0, \
.error_code = 0, \
/* \
* Cavium Octeon specifics (null if not Octeon) \
* Platform specific cop2 registers(null if no COP2) \
*/ \
OCTEON_INIT \
COP2_INIT \
}
struct task_struct;