1 #ifndef _SPARC_TRAP_BLOCK_H 2 #define _SPARC_TRAP_BLOCK_H 3 4 #include <asm/hypervisor.h> 5 #include <asm/asi.h> 6 7 #ifndef __ASSEMBLY__ 8 9 /* Trap handling code needs to get at a few critical values upon 10 * trap entry and to process TSB misses. These cannot be in the 11 * per_cpu() area as we really need to lock them into the TLB and 12 * thus make them part of the main kernel image. As a result we 13 * try to make this as small as possible. 14 * 15 * This is padded out and aligned to 64-bytes to avoid false sharing 16 * on SMP. 17 */ 18 19 /* If you modify the size of this structure, please update 20 * TRAP_BLOCK_SZ_SHIFT below. 21 */ 22 struct thread_info; 23 struct trap_per_cpu { 24 /* D-cache line 1: Basic thread information, cpu and device mondo queues */ 25 struct thread_info *thread; 26 unsigned long pgd_paddr; 27 unsigned long cpu_mondo_pa; 28 unsigned long dev_mondo_pa; 29 30 /* D-cache line 2: Error Mondo Queue and kernel buffer pointers */ 31 unsigned long resum_mondo_pa; 32 unsigned long resum_kernel_buf_pa; 33 unsigned long nonresum_mondo_pa; 34 unsigned long nonresum_kernel_buf_pa; 35 36 /* Dcache lines 3, 4, 5, and 6: Hypervisor Fault Status */ 37 struct hv_fault_status fault_info; 38 39 /* Dcache line 7: Physical addresses of CPU send mondo block and CPU list. */ 40 unsigned long cpu_mondo_block_pa; 41 unsigned long cpu_list_pa; 42 unsigned long tsb_huge; 43 unsigned long tsb_huge_temp; 44 45 /* Dcache line 8: IRQ work list, and keep trap_block a power-of-2 in size. */ 46 unsigned long irq_worklist_pa; 47 unsigned int cpu_mondo_qmask; 48 unsigned int dev_mondo_qmask; 49 unsigned int resum_qmask; 50 unsigned int nonresum_qmask; 51 unsigned long __per_cpu_base; 52 } __attribute__((aligned(64))); 53 extern struct trap_per_cpu trap_block[NR_CPUS]; 54 void init_cur_cpu_trap(struct thread_info *); 55 void setup_tba(void); 56 extern int ncpus_probed; 57 58 unsigned long real_hard_smp_processor_id(void); 59 60 struct cpuid_patch_entry { 61 unsigned int addr; 62 unsigned int cheetah_safari[4]; 63 unsigned int cheetah_jbus[4]; 64 unsigned int starfire[4]; 65 unsigned int sun4v[4]; 66 }; 67 extern struct cpuid_patch_entry __cpuid_patch, __cpuid_patch_end; 68 69 struct sun4v_1insn_patch_entry { 70 unsigned int addr; 71 unsigned int insn; 72 }; 73 extern struct sun4v_1insn_patch_entry __sun4v_1insn_patch, 74 __sun4v_1insn_patch_end; 75 76 struct sun4v_2insn_patch_entry { 77 unsigned int addr; 78 unsigned int insns[2]; 79 }; 80 extern struct sun4v_2insn_patch_entry __sun4v_2insn_patch, 81 __sun4v_2insn_patch_end; 82 83 84 #endif /* !(__ASSEMBLY__) */ 85 86 #define TRAP_PER_CPU_THREAD 0x00 87 #define TRAP_PER_CPU_PGD_PADDR 0x08 88 #define TRAP_PER_CPU_CPU_MONDO_PA 0x10 89 #define TRAP_PER_CPU_DEV_MONDO_PA 0x18 90 #define TRAP_PER_CPU_RESUM_MONDO_PA 0x20 91 #define TRAP_PER_CPU_RESUM_KBUF_PA 0x28 92 #define TRAP_PER_CPU_NONRESUM_MONDO_PA 0x30 93 #define TRAP_PER_CPU_NONRESUM_KBUF_PA 0x38 94 #define TRAP_PER_CPU_FAULT_INFO 0x40 95 #define TRAP_PER_CPU_CPU_MONDO_BLOCK_PA 0xc0 96 #define TRAP_PER_CPU_CPU_LIST_PA 0xc8 97 #define TRAP_PER_CPU_TSB_HUGE 0xd0 98 #define TRAP_PER_CPU_TSB_HUGE_TEMP 0xd8 99 #define TRAP_PER_CPU_IRQ_WORKLIST_PA 0xe0 100 #define TRAP_PER_CPU_CPU_MONDO_QMASK 0xe8 101 #define TRAP_PER_CPU_DEV_MONDO_QMASK 0xec 102 #define TRAP_PER_CPU_RESUM_QMASK 0xf0 103 #define TRAP_PER_CPU_NONRESUM_QMASK 0xf4 104 #define TRAP_PER_CPU_PER_CPU_BASE 0xf8 105 106 #define TRAP_BLOCK_SZ_SHIFT 8 107 108 #include <asm/scratchpad.h> 109 110 #define __GET_CPUID(REG) \ 111 /* Spitfire implementation (default). */ \ 112 661: ldxa [%g0] ASI_UPA_CONFIG, REG; \ 113 srlx REG, 17, REG; \ 114 and REG, 0x1f, REG; \ 115 nop; \ 116 .section .cpuid_patch, "ax"; \ 117 /* Instruction location. */ \ 118 .word 661b; \ 119 /* Cheetah Safari implementation. */ \ 120 ldxa [%g0] ASI_SAFARI_CONFIG, REG; \ 121 srlx REG, 17, REG; \ 122 and REG, 0x3ff, REG; \ 123 nop; \ 124 /* Cheetah JBUS implementation. */ \ 125 ldxa [%g0] ASI_JBUS_CONFIG, REG; \ 126 srlx REG, 17, REG; \ 127 and REG, 0x1f, REG; \ 128 nop; \ 129 /* Starfire implementation. */ \ 130 sethi %hi(0x1fff40000d0 >> 9), REG; \ 131 sllx REG, 9, REG; \ 132 or REG, 0xd0, REG; \ 133 lduwa [REG] ASI_PHYS_BYPASS_EC_E, REG;\ 134 /* sun4v implementation. */ \ 135 mov SCRATCHPAD_CPUID, REG; \ 136 ldxa [REG] ASI_SCRATCHPAD, REG; \ 137 nop; \ 138 nop; \ 139 .previous; 140 141 #ifdef CONFIG_SMP 142 143 #define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 144 __GET_CPUID(TMP) \ 145 sethi %hi(trap_block), DEST; \ 146 sllx TMP, TRAP_BLOCK_SZ_SHIFT, TMP; \ 147 or DEST, %lo(trap_block), DEST; \ 148 add DEST, TMP, DEST; \ 149 150 /* Clobbers TMP, current address space PGD phys address into DEST. */ 151 #define TRAP_LOAD_PGD_PHYS(DEST, TMP) \ 152 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 153 ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST; 154 155 /* Clobbers TMP, loads local processor's IRQ work area into DEST. */ 156 #define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP) \ 157 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 158 add DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST; 159 160 /* Clobbers TMP, loads DEST with current thread info pointer. */ 161 #define TRAP_LOAD_THREAD_REG(DEST, TMP) \ 162 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 163 ldx [DEST + TRAP_PER_CPU_THREAD], DEST; 164 165 /* Given the current thread info pointer in THR, load the per-cpu 166 * area base of the current processor into DEST. REG1, REG2, and REG3 are 167 * clobbered. 168 * 169 * You absolutely cannot use DEST as a temporary in this code. The 170 * reason is that traps can happen during execution, and return from 171 * trap will load the fully resolved DEST per-cpu base. This can corrupt 172 * the calculations done by the macro mid-stream. 173 */ 174 #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3) \ 175 lduh [THR + TI_CPU], REG1; \ 176 sethi %hi(trap_block), REG2; \ 177 sllx REG1, TRAP_BLOCK_SZ_SHIFT, REG1; \ 178 or REG2, %lo(trap_block), REG2; \ 179 add REG2, REG1, REG2; \ 180 ldx [REG2 + TRAP_PER_CPU_PER_CPU_BASE], DEST; 181 182 #else 183 184 #define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 185 sethi %hi(trap_block), DEST; \ 186 or DEST, %lo(trap_block), DEST; \ 187 188 /* Uniprocessor versions, we know the cpuid is zero. */ 189 #define TRAP_LOAD_PGD_PHYS(DEST, TMP) \ 190 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 191 ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST; 192 193 /* Clobbers TMP, loads local processor's IRQ work area into DEST. */ 194 #define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP) \ 195 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 196 add DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST; 197 198 #define TRAP_LOAD_THREAD_REG(DEST, TMP) \ 199 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 200 ldx [DEST + TRAP_PER_CPU_THREAD], DEST; 201 202 /* No per-cpu areas on uniprocessor, so no need to load DEST. */ 203 #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3) 204 205 #endif /* !(CONFIG_SMP) */ 206 207 #endif /* _SPARC_TRAP_BLOCK_H */ 208