arch/sparc/include/asm/trap_block.h - arm/linux-arm64-legacy - Git at Google

 #ifndef _SPARC_TRAP_BLOCK_H
 #define _SPARC_TRAP_BLOCK_H

 #include <asm/hypervisor.h>
 #include <asm/asi.h>

 #ifndef __ASSEMBLY__

 /* Trap handling code needs to get at a few critical values upon
  * trap entry and to process TSB misses.  These cannot be in the
  * per_cpu() area as we really need to lock them into the TLB and
  * thus make them part of the main kernel image.  As a result we
  * try to make this as small as possible.
  *
  * This is padded out and aligned to 64-bytes to avoid false sharing
  * on SMP.
  */

 /* If you modify the size of this structure, please update
  * TRAP_BLOCK_SZ_SHIFT below.
  */
 struct thread_info;
 struct trap_per_cpu {
 /* D-cache line 1: Basic thread information, cpu and device mondo queues */
 	struct thread_info	*thread;
 	unsigned long		pgd_paddr;
 	unsigned long		cpu_mondo_pa;
 	unsigned long		dev_mondo_pa;

 /* D-cache line 2: Error Mondo Queue and kernel buffer pointers */
 	unsigned long		resum_mondo_pa;
 	unsigned long		resum_kernel_buf_pa;
 	unsigned long		nonresum_mondo_pa;
 	unsigned long		nonresum_kernel_buf_pa;

 /* Dcache lines 3, 4, 5, and 6: Hypervisor Fault Status */
 	struct hv_fault_status	fault_info;

 /* Dcache line 7: Physical addresses of CPU send mondo block and CPU list.  */
 	unsigned long		cpu_mondo_block_pa;
 	unsigned long		cpu_list_pa;
 	unsigned long		tsb_huge;
 	unsigned long		tsb_huge_temp;

 /* Dcache line 8: IRQ work list, and keep trap_block a power-of-2 in size.  */
 	unsigned long		irq_worklist_pa;
 	unsigned int		cpu_mondo_qmask;
 	unsigned int		dev_mondo_qmask;
 	unsigned int		resum_qmask;
 	unsigned int		nonresum_qmask;
 	unsigned long		__per_cpu_base;
 } __attribute__((aligned(64)));
 extern struct trap_per_cpu trap_block[NR_CPUS];
 void init_cur_cpu_trap(struct thread_info *);
 void setup_tba(void);
 extern int ncpus_probed;

 unsigned long real_hard_smp_processor_id(void);

 struct cpuid_patch_entry {
 	unsigned int	addr;
 	unsigned int	cheetah_safari[4];
 	unsigned int	cheetah_jbus[4];
 	unsigned int	starfire[4];
 	unsigned int	sun4v[4];
 };
 extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;

 struct sun4v_1insn_patch_entry {
 	unsigned int	addr;
 	unsigned int	insn;
 };
 extern struct sun4v_1insn_patch_entry __sun4v_1insn_patch,
 	__sun4v_1insn_patch_end;

 struct sun4v_2insn_patch_entry {
 	unsigned int	addr;
 	unsigned int	insns[2];
 };
 extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
 	__sun4v_2insn_patch_end;


 #endif /* !(__ASSEMBLY__) */

 #define TRAP_PER_CPU_THREAD		0x00
 #define TRAP_PER_CPU_PGD_PADDR		0x08
 #define TRAP_PER_CPU_CPU_MONDO_PA	0x10
 #define TRAP_PER_CPU_DEV_MONDO_PA	0x18
 #define TRAP_PER_CPU_RESUM_MONDO_PA	0x20
 #define TRAP_PER_CPU_RESUM_KBUF_PA	0x28
 #define TRAP_PER_CPU_NONRESUM_MONDO_PA	0x30
 #define TRAP_PER_CPU_NONRESUM_KBUF_PA	0x38
 #define TRAP_PER_CPU_FAULT_INFO		0x40
 #define TRAP_PER_CPU_CPU_MONDO_BLOCK_PA	0xc0
 #define TRAP_PER_CPU_CPU_LIST_PA	0xc8
 #define TRAP_PER_CPU_TSB_HUGE		0xd0
 #define TRAP_PER_CPU_TSB_HUGE_TEMP	0xd8
 #define TRAP_PER_CPU_IRQ_WORKLIST_PA	0xe0
 #define TRAP_PER_CPU_CPU_MONDO_QMASK	0xe8
 #define TRAP_PER_CPU_DEV_MONDO_QMASK	0xec
 #define TRAP_PER_CPU_RESUM_QMASK	0xf0
 #define TRAP_PER_CPU_NONRESUM_QMASK	0xf4
 #define TRAP_PER_CPU_PER_CPU_BASE	0xf8

 #define TRAP_BLOCK_SZ_SHIFT		8

 #include <asm/scratchpad.h>

 #define __GET_CPUID(REG)				\
 	/* Spitfire implementation (default). */	\
 661:	ldxa		[%g0] ASI_UPA_CONFIG, REG;	\
 	srlx		REG, 17, REG;			\
 	 and		REG, 0x1f, REG;			\
 	nop;						\
 	.section	.cpuid_patch, "ax";		\
 	/* Instruction location. */			\
 	.word		661b;				\
 	/* Cheetah Safari implementation. */		\
 	ldxa		[%g0] ASI_SAFARI_CONFIG, REG;	\
 	srlx		REG, 17, REG;			\
 	and		REG, 0x3ff, REG;		\
 	nop;						\
 	/* Cheetah JBUS implementation. */		\
 	ldxa		[%g0] ASI_JBUS_CONFIG, REG;	\
 	srlx		REG, 17, REG;			\
 	and		REG, 0x1f, REG;			\
 	nop;						\
 	/* Starfire implementation. */			\
 	sethi		%hi(0x1fff40000d0 >> 9), REG;	\
 	sllx		REG, 9, REG;			\
 	or		REG, 0xd0, REG;			\
 	lduwa		[REG] ASI_PHYS_BYPASS_EC_E, REG;\
 	/* sun4v implementation. */			\
 	mov		SCRATCHPAD_CPUID, REG;		\
 	ldxa		[REG] ASI_SCRATCHPAD, REG;	\
 	nop;						\
 	nop;						\
 	.previous;

 #ifdef CONFIG_SMP

 #define TRAP_LOAD_TRAP_BLOCK(DEST, TMP)		\
 	__GET_CPUID(TMP)			\
 	sethi	%hi(trap_block), DEST;		\
 	sllx	TMP, TRAP_BLOCK_SZ_SHIFT, TMP;	\
 	or	DEST, %lo(trap_block), DEST;	\
 	add	DEST, TMP, DEST;		\

 /* Clobbers TMP, current address space PGD phys address into DEST.  */
 #define TRAP_LOAD_PGD_PHYS(DEST, TMP)		\
 	TRAP_LOAD_TRAP_BLOCK(DEST, TMP)		\
 	ldx	[DEST + TRAP_PER_CPU_PGD_PADDR], DEST;

 /* Clobbers TMP, loads local processor's IRQ work area into DEST.  */
 #define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP)	\
 	TRAP_LOAD_TRAP_BLOCK(DEST, TMP)		\
 	add	DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST;

 /* Clobbers TMP, loads DEST with current thread info pointer.  */
 #define TRAP_LOAD_THREAD_REG(DEST, TMP)		\
 	TRAP_LOAD_TRAP_BLOCK(DEST, TMP)		\
 	ldx	[DEST + TRAP_PER_CPU_THREAD], DEST;

 /* Given the current thread info pointer in THR, load the per-cpu
  * area base of the current processor into DEST.  REG1, REG2, and REG3 are
  * clobbered.
  *
  * You absolutely cannot use DEST as a temporary in this code.  The
  * reason is that traps can happen during execution, and return from
  * trap will load the fully resolved DEST per-cpu base.  This can corrupt
  * the calculations done by the macro mid-stream.
  */
 #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3)	\
 	lduh	[THR + TI_CPU], REG1;			\
 	sethi	%hi(trap_block), REG2;			\
 	sllx	REG1, TRAP_BLOCK_SZ_SHIFT, REG1;	\
 	or	REG2, %lo(trap_block), REG2;		\
 	add	REG2, REG1, REG2;			\
 	ldx	[REG2 + TRAP_PER_CPU_PER_CPU_BASE], DEST;

 #else

 #define TRAP_LOAD_TRAP_BLOCK(DEST, TMP)		\
 	sethi	%hi(trap_block), DEST;		\
 	or	DEST, %lo(trap_block), DEST;	\

 /* Uniprocessor versions, we know the cpuid is zero.  */
 #define TRAP_LOAD_PGD_PHYS(DEST, TMP)		\
 	TRAP_LOAD_TRAP_BLOCK(DEST, TMP)		\
 	ldx	[DEST + TRAP_PER_CPU_PGD_PADDR], DEST;

 /* Clobbers TMP, loads local processor's IRQ work area into DEST.  */
 #define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP)	\
 	TRAP_LOAD_TRAP_BLOCK(DEST, TMP)		\
 	add	DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST;

 #define TRAP_LOAD_THREAD_REG(DEST, TMP)		\
 	TRAP_LOAD_TRAP_BLOCK(DEST, TMP)		\
 	ldx	[DEST + TRAP_PER_CPU_THREAD], DEST;

 /* No per-cpu areas on uniprocessor, so no need to load DEST.  */
 #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3)

 #endif /* !(CONFIG_SMP) */

 #endif /* _SPARC_TRAP_BLOCK_H */
	#ifndef _SPARC_TRAP_BLOCK_H
	#define _SPARC_TRAP_BLOCK_H

	#include <asm/hypervisor.h>
	#include <asm/asi.h>

	#ifndef __ASSEMBLY__

	/* Trap handling code needs to get at a few critical values upon
	* trap entry and to process TSB misses. These cannot be in the
	* per_cpu() area as we really need to lock them into the TLB and
	* thus make them part of the main kernel image. As a result we
	* try to make this as small as possible.
	*
	* This is padded out and aligned to 64-bytes to avoid false sharing
	* on SMP.
	*/

	/* If you modify the size of this structure, please update
	* TRAP_BLOCK_SZ_SHIFT below.
	*/
	struct thread_info;
	struct trap_per_cpu {
	/* D-cache line 1: Basic thread information, cpu and device mondo queues */
	struct thread_info *thread;
	unsigned long pgd_paddr;
	unsigned long cpu_mondo_pa;
	unsigned long dev_mondo_pa;

	/* D-cache line 2: Error Mondo Queue and kernel buffer pointers */
	unsigned long resum_mondo_pa;
	unsigned long resum_kernel_buf_pa;
	unsigned long nonresum_mondo_pa;
	unsigned long nonresum_kernel_buf_pa;

	/* Dcache lines 3, 4, 5, and 6: Hypervisor Fault Status */
	struct hv_fault_status fault_info;

	/* Dcache line 7: Physical addresses of CPU send mondo block and CPU list. */
	unsigned long cpu_mondo_block_pa;
	unsigned long cpu_list_pa;
	unsigned long tsb_huge;
	unsigned long tsb_huge_temp;

	/* Dcache line 8: IRQ work list, and keep trap_block a power-of-2 in size. */
	unsigned long irq_worklist_pa;
	unsigned int cpu_mondo_qmask;
	unsigned int dev_mondo_qmask;
	unsigned int resum_qmask;
	unsigned int nonresum_qmask;
	unsigned long __per_cpu_base;
	} __attribute__((aligned(64)));
	extern struct trap_per_cpu trap_block[NR_CPUS];
	void init_cur_cpu_trap(struct thread_info *);
	void setup_tba(void);
	extern int ncpus_probed;

	unsigned long real_hard_smp_processor_id(void);

	struct cpuid_patch_entry {
	unsigned int addr;
	unsigned int cheetah_safari[4];
	unsigned int cheetah_jbus[4];
	unsigned int starfire[4];
	unsigned int sun4v[4];
	};
	extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end;

	struct sun4v_1insn_patch_entry {
	unsigned int addr;
	unsigned int insn;
	};
	extern struct sun4v_1insn_patch_entry __sun4v_1insn_patch,
	__sun4v_1insn_patch_end;

	struct sun4v_2insn_patch_entry {
	unsigned int addr;
	unsigned int insns[2];
	};
	extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch,
	__sun4v_2insn_patch_end;


	#endif /* !(__ASSEMBLY__) */

	#define TRAP_PER_CPU_THREAD 0x00
	#define TRAP_PER_CPU_PGD_PADDR 0x08
	#define TRAP_PER_CPU_CPU_MONDO_PA 0x10
	#define TRAP_PER_CPU_DEV_MONDO_PA 0x18
	#define TRAP_PER_CPU_RESUM_MONDO_PA 0x20
	#define TRAP_PER_CPU_RESUM_KBUF_PA 0x28
	#define TRAP_PER_CPU_NONRESUM_MONDO_PA 0x30
	#define TRAP_PER_CPU_NONRESUM_KBUF_PA 0x38
	#define TRAP_PER_CPU_FAULT_INFO 0x40
	#define TRAP_PER_CPU_CPU_MONDO_BLOCK_PA 0xc0
	#define TRAP_PER_CPU_CPU_LIST_PA 0xc8
	#define TRAP_PER_CPU_TSB_HUGE 0xd0
	#define TRAP_PER_CPU_TSB_HUGE_TEMP 0xd8
	#define TRAP_PER_CPU_IRQ_WORKLIST_PA 0xe0
	#define TRAP_PER_CPU_CPU_MONDO_QMASK 0xe8
	#define TRAP_PER_CPU_DEV_MONDO_QMASK 0xec
	#define TRAP_PER_CPU_RESUM_QMASK 0xf0
	#define TRAP_PER_CPU_NONRESUM_QMASK 0xf4
	#define TRAP_PER_CPU_PER_CPU_BASE 0xf8

	#define TRAP_BLOCK_SZ_SHIFT 8

	#include <asm/scratchpad.h>

	#define __GET_CPUID(REG) \
	/* Spitfire implementation (default). */ \
	661: ldxa [%g0] ASI_UPA_CONFIG, REG; \
	srlx REG, 17, REG; \
	and REG, 0x1f, REG; \
	nop; \
	.section .cpuid_patch, "ax"; \
	/* Instruction location. */ \
	.word 661b; \
	/* Cheetah Safari implementation. */ \
	ldxa [%g0] ASI_SAFARI_CONFIG, REG; \
	srlx REG, 17, REG; \
	and REG, 0x3ff, REG; \
	nop; \
	/* Cheetah JBUS implementation. */ \
	ldxa [%g0] ASI_JBUS_CONFIG, REG; \
	srlx REG, 17, REG; \
	and REG, 0x1f, REG; \
	nop; \
	/* Starfire implementation. */ \
	sethi %hi(0x1fff40000d0 >> 9), REG; \
	sllx REG, 9, REG; \
	or REG, 0xd0, REG; \
	lduwa [REG] ASI_PHYS_BYPASS_EC_E, REG;\
	/* sun4v implementation. */ \
	mov SCRATCHPAD_CPUID, REG; \
	ldxa [REG] ASI_SCRATCHPAD, REG; \
	nop; \
	nop; \
	.previous;

	#ifdef CONFIG_SMP

	#define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
	__GET_CPUID(TMP) \
	sethi %hi(trap_block), DEST; \
	sllx TMP, TRAP_BLOCK_SZ_SHIFT, TMP; \
	or DEST, %lo(trap_block), DEST; \
	add DEST, TMP, DEST; \

	/* Clobbers TMP, current address space PGD phys address into DEST. */
	#define TRAP_LOAD_PGD_PHYS(DEST, TMP) \
	TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
	ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;

	/* Clobbers TMP, loads local processor's IRQ work area into DEST. */
	#define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP) \
	TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
	add DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST;

	/* Clobbers TMP, loads DEST with current thread info pointer. */
	#define TRAP_LOAD_THREAD_REG(DEST, TMP) \
	TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
	ldx [DEST + TRAP_PER_CPU_THREAD], DEST;

	/* Given the current thread info pointer in THR, load the per-cpu
	* area base of the current processor into DEST. REG1, REG2, and REG3 are
	* clobbered.
	*
	* You absolutely cannot use DEST as a temporary in this code. The
	* reason is that traps can happen during execution, and return from
	* trap will load the fully resolved DEST per-cpu base. This can corrupt
	* the calculations done by the macro mid-stream.
	*/
	#define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3) \
	lduh [THR + TI_CPU], REG1; \
	sethi %hi(trap_block), REG2; \
	sllx REG1, TRAP_BLOCK_SZ_SHIFT, REG1; \
	or REG2, %lo(trap_block), REG2; \
	add REG2, REG1, REG2; \
	ldx [REG2 + TRAP_PER_CPU_PER_CPU_BASE], DEST;

	#else

	#define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
	sethi %hi(trap_block), DEST; \
	or DEST, %lo(trap_block), DEST; \

	/* Uniprocessor versions, we know the cpuid is zero. */
	#define TRAP_LOAD_PGD_PHYS(DEST, TMP) \
	TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
	ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST;

	/* Clobbers TMP, loads local processor's IRQ work area into DEST. */
	#define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP) \
	TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
	add DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST;

	#define TRAP_LOAD_THREAD_REG(DEST, TMP) \
	TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \
	ldx [DEST + TRAP_PER_CPU_THREAD], DEST;

	/* No per-cpu areas on uniprocessor, so no need to load DEST. */
	#define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3)

	#endif /* !(CONFIG_SMP) */

	#endif /* _SPARC_TRAP_BLOCK_H */