mipsregs.h
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上传日期:2013-04-10
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- /*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1994, 1995, 1996, 1997, 2000, 2001 by Ralf Baechle
- * Copyright (C) 2000 Silicon Graphics, Inc.
- * Modified for further R[236]000 support by Paul M. Antoine, 1996.
- * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
- */
- #ifndef _ASM_MIPSREGS_H
- #define _ASM_MIPSREGS_H
- #include <linux/config.h>
- #include <linux/linkage.h>
- /*
- * The following macros are especially useful for __asm__
- * inline assembler.
- */
- #ifndef __STR
- #define __STR(x) #x
- #endif
- #ifndef STR
- #define STR(x) __STR(x)
- #endif
- /*
- * Coprocessor 0 register names
- */
- #define CP0_INDEX $0
- #define CP0_RANDOM $1
- #define CP0_ENTRYLO0 $2
- #define CP0_ENTRYLO1 $3
- #define CP0_CONF $3
- #define CP0_CONTEXT $4
- #define CP0_PAGEMASK $5
- #define CP0_WIRED $6
- #define CP0_INFO $7
- #define CP0_BADVADDR $8
- #define CP0_COUNT $9
- #define CP0_ENTRYHI $10
- #define CP0_COMPARE $11
- #define CP0_STATUS $12
- #define CP0_CAUSE $13
- #define CP0_EPC $14
- #define CP0_PRID $15
- #define CP0_CONFIG $16
- #define CP0_LLADDR $17
- #define CP0_WATCHLO $18
- #define CP0_WATCHHI $19
- #define CP0_XCONTEXT $20
- #define CP0_FRAMEMASK $21
- #define CP0_DIAGNOSTIC $22
- #define CP0_DEBUG $23
- #define CP0_DEPC $24
- #define CP0_PERFORMANCE $25
- #define CP0_ECC $26
- #define CP0_CACHEERR $27
- #define CP0_TAGLO $28
- #define CP0_TAGHI $29
- #define CP0_ERROREPC $30
- #define CP0_DESAVE $31
- /*
- * R4640/R4650 cp0 register names. These registers are listed
- * here only for completeness; without MMU these CPUs are not useable
- * by Linux. A future ELKS port might take make Linux run on them
- * though ...
- */
- #define CP0_IBASE $0
- #define CP0_IBOUND $1
- #define CP0_DBASE $2
- #define CP0_DBOUND $3
- #define CP0_CALG $17
- #define CP0_IWATCH $18
- #define CP0_DWATCH $19
- /*
- * Coprocessor 0 Set 1 register names
- */
- #define CP0_S1_DERRADDR0 $26
- #define CP0_S1_DERRADDR1 $27
- #define CP0_S1_INTCONTROL $20
- /*
- * TX39 Series
- */
- #define CP0_TX39_CACHE $7
- /*
- * Coprocessor 1 (FPU) register names
- */
- #define CP1_REVISION $0
- #define CP1_STATUS $31
- /*
- * FPU Status Register Values
- */
- /*
- * Status Register Values
- */
- #define FPU_CSR_FLUSH 0x01000000 /* flush denormalised results to 0 */
- #define FPU_CSR_COND 0x00800000 /* $fcc0 */
- #define FPU_CSR_COND0 0x00800000 /* $fcc0 */
- #define FPU_CSR_COND1 0x02000000 /* $fcc1 */
- #define FPU_CSR_COND2 0x04000000 /* $fcc2 */
- #define FPU_CSR_COND3 0x08000000 /* $fcc3 */
- #define FPU_CSR_COND4 0x10000000 /* $fcc4 */
- #define FPU_CSR_COND5 0x20000000 /* $fcc5 */
- #define FPU_CSR_COND6 0x40000000 /* $fcc6 */
- #define FPU_CSR_COND7 0x80000000 /* $fcc7 */
- /*
- * X the exception cause indicator
- * E the exception enable
- * S the sticky/flag bit
- */
- #define FPU_CSR_ALL_X 0x0003f000
- #define FPU_CSR_UNI_X 0x00020000
- #define FPU_CSR_INV_X 0x00010000
- #define FPU_CSR_DIV_X 0x00008000
- #define FPU_CSR_OVF_X 0x00004000
- #define FPU_CSR_UDF_X 0x00002000
- #define FPU_CSR_INE_X 0x00001000
- #define FPU_CSR_ALL_E 0x00000f80
- #define FPU_CSR_INV_E 0x00000800
- #define FPU_CSR_DIV_E 0x00000400
- #define FPU_CSR_OVF_E 0x00000200
- #define FPU_CSR_UDF_E 0x00000100
- #define FPU_CSR_INE_E 0x00000080
- #define FPU_CSR_ALL_S 0x0000007c
- #define FPU_CSR_INV_S 0x00000040
- #define FPU_CSR_DIV_S 0x00000020
- #define FPU_CSR_OVF_S 0x00000010
- #define FPU_CSR_UDF_S 0x00000008
- #define FPU_CSR_INE_S 0x00000004
- /* rounding mode */
- #define FPU_CSR_RN 0x0 /* nearest */
- #define FPU_CSR_RZ 0x1 /* towards zero */
- #define FPU_CSR_RU 0x2 /* towards +Infinity */
- #define FPU_CSR_RD 0x3 /* towards -Infinity */
- /*
- * Values for PageMask register
- */
- #ifdef CONFIG_CPU_VR41XX
- /* Why doesn't stupidity hurt ... */
- #define PM_1K 0x00000000
- #define PM_4K 0x00001800
- #define PM_16K 0x00007800
- #define PM_64K 0x0001f800
- #define PM_256K 0x0007f800
- #else
- #define PM_4K 0x00000000
- #define PM_16K 0x00006000
- #define PM_64K 0x0001e000
- #define PM_256K 0x0007e000
- #define PM_1M 0x001fe000
- #define PM_4M 0x007fe000
- #define PM_16M 0x01ffe000
- #define PM_64M 0x07ffe000
- #define PM_256M 0x1fffe000
- #endif
- /*
- * Values used for computation of new tlb entries
- */
- #define PL_4K 12
- #define PL_16K 14
- #define PL_64K 16
- #define PL_256K 18
- #define PL_1M 20
- #define PL_4M 22
- #define PL_16M 24
- #define PL_64M 26
- #define PL_256M 28
- /*
- * R4x00 interrupt enable / cause bits
- */
- #define IE_SW0 (1<< 8)
- #define IE_SW1 (1<< 9)
- #define IE_IRQ0 (1<<10)
- #define IE_IRQ1 (1<<11)
- #define IE_IRQ2 (1<<12)
- #define IE_IRQ3 (1<<13)
- #define IE_IRQ4 (1<<14)
- #define IE_IRQ5 (1<<15)
- /*
- * R4x00 interrupt cause bits
- */
- #define C_SW0 (1<< 8)
- #define C_SW1 (1<< 9)
- #define C_IRQ0 (1<<10)
- #define C_IRQ1 (1<<11)
- #define C_IRQ2 (1<<12)
- #define C_IRQ3 (1<<13)
- #define C_IRQ4 (1<<14)
- #define C_IRQ5 (1<<15)
- /*
- * Bitfields in the R4xx0 cp0 status register
- */
- #define ST0_IE 0x00000001
- #define ST0_EXL 0x00000002
- #define ST0_ERL 0x00000004
- #define ST0_KSU 0x00000018
- # define KSU_USER 0x00000010
- # define KSU_SUPERVISOR 0x00000008
- # define KSU_KERNEL 0x00000000
- #define ST0_UX 0x00000020
- #define ST0_SX 0x00000040
- #define ST0_KX 0x00000080
- #define ST0_DE 0x00010000
- #define ST0_CE 0x00020000
- /*
- * Bitfields in the R[23]000 cp0 status register.
- */
- #define ST0_IEC 0x00000001
- #define ST0_KUC 0x00000002
- #define ST0_IEP 0x00000004
- #define ST0_KUP 0x00000008
- #define ST0_IEO 0x00000010
- #define ST0_KUO 0x00000020
- /* bits 6 & 7 are reserved on R[23]000 */
- #define ST0_ISC 0x00010000
- #define ST0_SWC 0x00020000
- #define ST0_CM 0x00080000
- /*
- * Bits specific to the R4640/R4650
- */
- #define ST0_UM (1 << 4)
- #define ST0_IL (1 << 23)
- #define ST0_DL (1 << 24)
- /*
- * Bitfields in the TX39 family CP0 Configuration Register 3
- */
- #define TX39_CONF_ICS_SHIFT 19
- #define TX39_CONF_ICS_MASK 0x00380000
- #define TX39_CONF_ICS_1KB 0x00000000
- #define TX39_CONF_ICS_2KB 0x00080000
- #define TX39_CONF_ICS_4KB 0x00100000
- #define TX39_CONF_ICS_8KB 0x00180000
- #define TX39_CONF_ICS_16KB 0x00200000
- #define TX39_CONF_DCS_SHIFT 16
- #define TX39_CONF_DCS_MASK 0x00070000
- #define TX39_CONF_DCS_1KB 0x00000000
- #define TX39_CONF_DCS_2KB 0x00010000
- #define TX39_CONF_DCS_4KB 0x00020000
- #define TX39_CONF_DCS_8KB 0x00030000
- #define TX39_CONF_DCS_16KB 0x00040000
- #define TX39_CONF_CWFON 0x00004000
- #define TX39_CONF_WBON 0x00002000
- #define TX39_CONF_RF_SHIFT 10
- #define TX39_CONF_RF_MASK 0x00000c00
- #define TX39_CONF_DOZE 0x00000200
- #define TX39_CONF_HALT 0x00000100
- #define TX39_CONF_LOCK 0x00000080
- #define TX39_CONF_ICE 0x00000020
- #define TX39_CONF_DCE 0x00000010
- #define TX39_CONF_IRSIZE_SHIFT 2
- #define TX39_CONF_IRSIZE_MASK 0x0000000c
- #define TX39_CONF_DRSIZE_SHIFT 0
- #define TX39_CONF_DRSIZE_MASK 0x00000003
- /*
- * Status register bits available in all MIPS CPUs.
- */
- #define ST0_IM 0x0000ff00
- #define STATUSB_IP0 8
- #define STATUSF_IP0 (1 << 8)
- #define STATUSB_IP1 9
- #define STATUSF_IP1 (1 << 9)
- #define STATUSB_IP2 10
- #define STATUSF_IP2 (1 << 10)
- #define STATUSB_IP3 11
- #define STATUSF_IP3 (1 << 11)
- #define STATUSB_IP4 12
- #define STATUSF_IP4 (1 << 12)
- #define STATUSB_IP5 13
- #define STATUSF_IP5 (1 << 13)
- #define STATUSB_IP6 14
- #define STATUSF_IP6 (1 << 14)
- #define STATUSB_IP7 15
- #define STATUSF_IP7 (1 << 15)
- #define STATUSB_IP8 0
- #define STATUSF_IP8 (1 << 0)
- #define STATUSB_IP9 1
- #define STATUSF_IP9 (1 << 1)
- #define STATUSB_IP10 2
- #define STATUSF_IP10 (1 << 2)
- #define STATUSB_IP11 3
- #define STATUSF_IP11 (1 << 3)
- #define STATUSB_IP12 4
- #define STATUSF_IP12 (1 << 4)
- #define STATUSB_IP13 5
- #define STATUSF_IP13 (1 << 5)
- #define STATUSB_IP14 6
- #define STATUSF_IP14 (1 << 6)
- #define STATUSB_IP15 7
- #define STATUSF_IP15 (1 << 7)
- #define ST0_CH 0x00040000
- #define ST0_SR 0x00100000
- #define ST0_TS 0x00200000
- #define ST0_BEV 0x00400000
- #define ST0_RE 0x02000000
- #define ST0_FR 0x04000000
- #define ST0_CU 0xf0000000
- #define ST0_CU0 0x10000000
- #define ST0_CU1 0x20000000
- #define ST0_CU2 0x40000000
- #define ST0_CU3 0x80000000
- #define ST0_XX 0x80000000 /* MIPS IV naming */
- /*
- * Bitfields and bit numbers in the coprocessor 0 cause register.
- *
- * Refer to your MIPS R4xx0 manual, chapter 5 for explanation.
- */
- #define CAUSEB_EXCCODE 2
- #define CAUSEF_EXCCODE (31 << 2)
- #define CAUSEB_IP 8
- #define CAUSEF_IP (255 << 8)
- #define CAUSEB_IP0 8
- #define CAUSEF_IP0 (1 << 8)
- #define CAUSEB_IP1 9
- #define CAUSEF_IP1 (1 << 9)
- #define CAUSEB_IP2 10
- #define CAUSEF_IP2 (1 << 10)
- #define CAUSEB_IP3 11
- #define CAUSEF_IP3 (1 << 11)
- #define CAUSEB_IP4 12
- #define CAUSEF_IP4 (1 << 12)
- #define CAUSEB_IP5 13
- #define CAUSEF_IP5 (1 << 13)
- #define CAUSEB_IP6 14
- #define CAUSEF_IP6 (1 << 14)
- #define CAUSEB_IP7 15
- #define CAUSEF_IP7 (1 << 15)
- #define CAUSEB_IV 23
- #define CAUSEF_IV (1 << 23)
- #define CAUSEB_CE 28
- #define CAUSEF_CE (3 << 28)
- #define CAUSEB_BD 31
- #define CAUSEF_BD (1 << 31)
- /*
- * Bits in the coprozessor 0 config register.
- */
- #define CONF_CM_CACHABLE_NO_WA 0
- #define CONF_CM_CACHABLE_WA 1
- #define CONF_CM_UNCACHED 2
- #define CONF_CM_CACHABLE_NONCOHERENT 3
- #define CONF_CM_CACHABLE_CE 4
- #define CONF_CM_CACHABLE_COW 5
- #define CONF_CM_CACHABLE_CUW 6
- #define CONF_CM_CACHABLE_ACCELERATED 7
- #define CONF_CM_CMASK 7
- #define CONF_CU (1 << 3)
- #define CONF_DB (1 << 4)
- #define CONF_IB (1 << 5)
- #define CONF_SE (1 << 12)
- #define CONF_SC (1 << 17)
- #define CONF_AC (1 << 23)
- #define CONF_HALT (1 << 25)
- /*
- * Bits in the TX49 coprozessor 0 config register.
- */
- #define TX49_CONF_DC (1 << 16)
- #define TX49_CONF_IC (1 << 17) /* conflict with CONF_SC */
- #define TX49_CONF_HALT (1 << 18)
- #define TX49_CONF_CWFON (1 << 27)
- /*
- * R10000 performance counter definitions.
- *
- * FIXME: The R10000 performance counter opens a nice way to implement CPU
- * time accounting with a precission of one cycle. I don't have
- * R10000 silicon but just a manual, so ...
- */
- /*
- * Events counted by counter #0
- */
- #define CE0_CYCLES 0
- #define CE0_INSN_ISSUED 1
- #define CE0_LPSC_ISSUED 2
- #define CE0_S_ISSUED 3
- #define CE0_SC_ISSUED 4
- #define CE0_SC_FAILED 5
- #define CE0_BRANCH_DECODED 6
- #define CE0_QW_WB_SECONDARY 7
- #define CE0_CORRECTED_ECC_ERRORS 8
- #define CE0_ICACHE_MISSES 9
- #define CE0_SCACHE_I_MISSES 10
- #define CE0_SCACHE_I_WAY_MISSPREDICTED 11
- #define CE0_EXT_INTERVENTIONS_REQ 12
- #define CE0_EXT_INVALIDATE_REQ 13
- #define CE0_VIRTUAL_COHERENCY_COND 14
- #define CE0_INSN_GRADUATED 15
- /*
- * Events counted by counter #1
- */
- #define CE1_CYCLES 0
- #define CE1_INSN_GRADUATED 1
- #define CE1_LPSC_GRADUATED 2
- #define CE1_S_GRADUATED 3
- #define CE1_SC_GRADUATED 4
- #define CE1_FP_INSN_GRADUATED 5
- #define CE1_QW_WB_PRIMARY 6
- #define CE1_TLB_REFILL 7
- #define CE1_BRANCH_MISSPREDICTED 8
- #define CE1_DCACHE_MISS 9
- #define CE1_SCACHE_D_MISSES 10
- #define CE1_SCACHE_D_WAY_MISSPREDICTED 11
- #define CE1_EXT_INTERVENTION_HITS 12
- #define CE1_EXT_INVALIDATE_REQ 13
- #define CE1_SP_HINT_TO_CEXCL_SC_BLOCKS 14
- #define CE1_SP_HINT_TO_SHARED_SC_BLOCKS 15
- /*
- * These flags define in which priviledge mode the counters count events
- */
- #define CEB_USER 8 /* Count events in user mode, EXL = ERL = 0 */
- #define CEB_SUPERVISOR 4 /* Count events in supvervisor mode EXL = ERL = 0 */
- #define CEB_KERNEL 2 /* Count events in kernel mode EXL = ERL = 0 */
- #define CEB_EXL 1 /* Count events with EXL = 1, ERL = 0 */
- #ifndef __ASSEMBLY__
- /*
- * Functions to access the r10k performance counter and control registers
- */
- #define read_r10k_perf_cntr(counter)
- ({ unsigned int __res;
- __asm__ __volatile__(
- "mfpct%0, "STR(counter)
- : "=r" (__res));
- __res;})
- #define write_r10k_perf_cntr(counter,val)
- __asm__ __volatile__(
- "mtpct%0, "STR(counter)
- : : "r" (val));
- #define read_r10k_perf_cntl(counter)
- ({ unsigned int __res;
- __asm__ __volatile__(
- "mfpst%0, "STR(counter)
- : "=r" (__res));
- __res;})
- #define write_r10k_perf_cntl(counter,val)
- __asm__ __volatile__(
- "mtpst%0, "STR(counter)
- : : "r" (val));
- /*
- * Macros to access the system control coprocessor
- */
- #define read_32bit_cp0_register(source)
- ({ int __res;
- __asm__ __volatile__(
- "mfc0t%0,"STR(source)
- : "=r" (__res));
- __res;})
- #define read_64bit_cp0_register(source)
- ({ unsigned long __res;
- __asm__ __volatile__(
- ".settmips3nt"
- "dmfc0t%0,"STR(source)"nt"
- ".settmips0"
- : "=r" (__res));
- __res;})
- #define write_32bit_cp0_register(register,value)
- __asm__ __volatile__(
- "mtc0t%0,"STR(register)
- : : "r" (value));
- #define write_64bit_cp0_register(register,value)
- __asm__ __volatile__(
- ".settmips3nt"
- "dmtc0t%0,"STR(register)"nt"
- ".settmips0"
- : : "r" (value))
- /*
- * This should be changed when we get a compiler that support the MIPS32 ISA.
- */
- #define read_mips32_cp0_config1()
- ({ int __res;
- __asm__ __volatile__(
- ".settnoreordernt"
- ".settnoatnt"
- "#.settmips64nt"
- "#mfc0t$1, $16, 1nt"
- "#.settmips0nt"
- ".wordt0x40018001nt"
- "movet%0,$1nt"
- ".settatnt"
- ".settreorder"
- :"=r" (__res));
- __res;})
- /*
- * Macros to access the floating point coprocessor control registers
- */
- #define read_32bit_cp1_register(source)
- ({ int __res;
- __asm__ __volatile__(
- ".settpushnt"
- ".settreordernt"
- "cfc1t%0,"STR(source)"nt"
- ".settpop"
- : "=r" (__res));
- __res;})
- /* TLB operations. */
- static inline void tlb_probe(void)
- {
- __asm__ __volatile__(
- ".set noreordernt"
- "tlbpnt"
- ".set reorder");
- }
- static inline void tlb_read(void)
- {
- __asm__ __volatile__(
- ".set noreordernt"
- "tlbrnt"
- ".set reorder");
- }
- static inline void tlb_write_indexed(void)
- {
- __asm__ __volatile__(
- ".set noreordernt"
- "tlbwint"
- ".set reorder");
- }
- static inline void tlb_write_random(void)
- {
- __asm__ __volatile__(
- ".set noreordernt"
- "tlbwrnt"
- ".set reorder");
- }
- /* Dealing with various CP0 mmu/cache related registers. */
- /* CP0_PAGEMASK register */
- static inline unsigned long get_pagemask(void)
- {
- unsigned long val;
- __asm__ __volatile__(
- ".set noreordernt"
- "mfc0 %0, $5nt"
- ".set reorder"
- : "=r" (val));
- return val;
- }
- static inline void set_pagemask(unsigned long val)
- {
- __asm__ __volatile__(
- ".set noreordernt"
- "mtc0 %z0, $5nt"
- ".set reorder"
- : : "Jr" (val));
- }
- /* CP0_ENTRYLO0 and CP0_ENTRYLO1 registers */
- static inline unsigned long get_entrylo0(void)
- {
- unsigned long val;
- __asm__ __volatile__(
- ".set noreordernt"
- "dmfc0 %0, $2nt"
- ".set reorder"
- : "=r" (val));
- return val;
- }
- static inline void set_entrylo0(unsigned long val)
- {
- __asm__ __volatile__(
- ".set noreordernt"
- "dmtc0 %z0, $2nt"
- ".set reorder"
- : : "Jr" (val));
- }
- static inline unsigned long get_entrylo1(void)
- {
- unsigned long val;
- __asm__ __volatile__(
- ".set noreordernt"
- "dmfc0 %0, $3nt"
- ".set reorder" : "=r" (val));
- return val;
- }
- static inline void set_entrylo1(unsigned long val)
- {
- __asm__ __volatile__(
- ".set noreordernt"
- "dmtc0 %z0, $3nt"
- ".set reorder"
- : : "Jr" (val));
- }
- /* CP0_ENTRYHI register */
- static inline unsigned long get_entryhi(void)
- {
- unsigned long val;
- __asm__ __volatile__(
- ".set noreordernt"
- "dmfc0 %0, $10nt"
- ".set reorder"
- : "=r" (val));
- return val;
- }
- static inline void set_entryhi(unsigned long val)
- {
- __asm__ __volatile__(
- ".set noreordernt"
- "dmtc0 %z0, $10nt"
- ".set reorder"
- : : "Jr" (val));
- }
- /* CP0_INDEX register */
- static inline unsigned int get_index(void)
- {
- unsigned long val;
- __asm__ __volatile__(
- ".set noreordernt"
- "mfc0 %0, $0nt"
- ".set reorder"
- : "=r" (val));
- return val;
- }
- static inline void set_index(unsigned int val)
- {
- __asm__ __volatile__(
- ".set noreordernt"
- "mtc0 %z0, $0nt"
- ".set reordernt"
- : : "Jr" (val));
- }
- /* CP0_WIRED register */
- static inline unsigned long get_wired(void)
- {
- unsigned long val;
- __asm__ __volatile__(
- ".set noreordernt"
- "mfc0 %0, $6nt"
- ".set reordernt"
- : "=r" (val));
- return val;
- }
- static inline void set_wired(unsigned long val)
- {
- __asm__ __volatile__(
- "nt.set noreordernt"
- "mtc0 %z0, $6nt"
- ".set reorder"
- : : "Jr" (val));
- }
- static inline unsigned long get_info(void)
- {
- unsigned long val;
- __asm__(".set pushnt"
- ".set reordernt"
- "mfc0 %0, $7nt"
- ".set pop"
- : "=r" (val));
- return val;
- }
- /* CP0_STATUS registers */
- static inline unsigned long get_status(void)
- {
- unsigned long val;
- __asm__ __volatile__(
- ".set noreordernt"
- "mfc0 %0, $12nt"
- ".set reorder"
- : "=r" (val));
- return val;
- }
- static inline void set_status(unsigned long val)
- {
- __asm__ __volatile__(
- ".set noreordernt"
- "mtc0 %z0, $12nt"
- ".set reorder"
- : : "Jr" (val));
- }
- /* CP0_TAGLO and CP0_TAGHI registers */
- static inline unsigned long get_taglo(void)
- {
- unsigned long val;
- __asm__ __volatile__(
- ".set noreordernt"
- "mfc0 %0, $28nt"
- ".set reorder"
- : "=r" (val));
- return val;
- }
- static inline void set_taglo(unsigned long val)
- {
- __asm__ __volatile__(
- ".set noreordernt"
- "mtc0 %z0, $28nt"
- ".set reorder"
- : : "Jr" (val));
- }
- static inline unsigned long get_taghi(void)
- {
- unsigned long val;
- __asm__ __volatile__(
- ".set noreordernt"
- "mfc0 %0, $29nt"
- ".set reorder"
- : "=r" (val));
- return val;
- }
- static inline void set_taghi(unsigned long val)
- {
- __asm__ __volatile__(
- ".set noreordernt"
- "mtc0 %z0, $29nt"
- ".set reorder"
- : : "Jr" (val));
- }
- static inline unsigned long get_context(void)
- {
- unsigned long val;
- __asm__ __volatile__(
- ".set noreordernt"
- "dmfc0 %0, $4nt"
- ".set reorder"
- : "=r" (val));
- return val;
- }
- static inline void set_context(unsigned long val)
- {
- __asm__ __volatile__(
- ".set noreordernt"
- "dmtc0 %z0, $4nt"
- ".set reorder"
- : : "Jr" (val));
- }
- static inline unsigned long get_xcontext(void)
- {
- unsigned long val;
- __asm__ __volatile__(
- ".set noreordernt"
- "dmfc0 %0, $20nt"
- ".set reorder"
- : "=r" (val));
- return val;
- }
- static inline void set_xcontext(unsigned long val)
- {
- __asm__ __volatile__(
- ".set noreordernt"
- "dmtc0 %z0, $20nt"
- ".set reorder"
- : : "Jr" (val));
- }
- static inline unsigned long get_errorepc(void)
- {
- unsigned long val;
- __asm__ __volatile__(
- ".set pushnt"
- ".set reordernt"
- "dmfc0 %0, $30nt"
- ".set pop"
- : "=r" (val));
- return val;
- }
- static inline void set_errorepc(unsigned long val)
- {
- __asm__ __volatile__(
- ".set pushnt"
- ".set reordernt"
- "dmtc0 %z0, $30nt"
- ".set pop"
- : : "Jr" (val));
- }
- /*
- * Manipulate the status register.
- * Mostly used to access the interrupt bits.
- */
- #define __BUILD_SET_CP0(name,register)
- static inline unsigned int
- set_cp0_##name(unsigned int set)
- {
- unsigned int res;
-
- res = read_32bit_cp0_register(register);
- res |= set;
- write_32bit_cp0_register(register, res);
-
- return res;
- }
-
- static inline unsigned int
- clear_cp0_##name(unsigned int clear)
- {
- unsigned int res;
-
- res = read_32bit_cp0_register(register);
- res &= ~clear;
- write_32bit_cp0_register(register, res);
-
- return res;
- }
-
- static inline unsigned int
- change_cp0_##name(unsigned int change, unsigned int new)
- {
- unsigned int res;
-
- res = read_32bit_cp0_register(register);
- res &= ~change;
- res |= (new & change);
- if (change)
- write_32bit_cp0_register(register, res);
-
- return res;
- }
- __BUILD_SET_CP0(status,CP0_STATUS)
- __BUILD_SET_CP0(cause,CP0_CAUSE)
- __BUILD_SET_CP0(config,CP0_CONFIG)
- #define __enable_fpu()
- do {
- set_cp0_status(ST0_CU1);
- asm("nop;nop;nop;nop"); /* max. hazard */
- } while (0)
- #define __disable_fpu()
- do {
- clear_cp0_status(ST0_CU1);
- /* We don't care about the cp0 hazard here */
- } while (0)
- #define enable_fpu()
- do {
- if (mips_cpu.options & MIPS_CPU_FPU)
- __enable_fpu();
- } while (0)
- #define disable_fpu()
- do {
- if (mips_cpu.options & MIPS_CPU_FPU)
- __disable_fpu();
- } while (0)
- #endif /* !__ASSEMBLY__ */
- #endif /* _ASM_MIPSREGS_H */