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 extern struct sun4v_2insn_patch_entry __sun_m7_2insn_patch, 83 __sun_m7_2insn_patch_end; 84 85 86 #endif /* !(__ASSEMBLY__) */ 87 88 #define TRAP_PER_CPU_THREAD 0x00 89 #define TRAP_PER_CPU_PGD_PADDR 0x08 90 #define TRAP_PER_CPU_CPU_MONDO_PA 0x10 91 #define TRAP_PER_CPU_DEV_MONDO_PA 0x18 92 #define TRAP_PER_CPU_RESUM_MONDO_PA 0x20 93 #define TRAP_PER_CPU_RESUM_KBUF_PA 0x28 94 #define TRAP_PER_CPU_NONRESUM_MONDO_PA 0x30 95 #define TRAP_PER_CPU_NONRESUM_KBUF_PA 0x38 96 #define TRAP_PER_CPU_FAULT_INFO 0x40 97 #define TRAP_PER_CPU_CPU_MONDO_BLOCK_PA 0xc0 98 #define TRAP_PER_CPU_CPU_LIST_PA 0xc8 99 #define TRAP_PER_CPU_TSB_HUGE 0xd0 100 #define TRAP_PER_CPU_TSB_HUGE_TEMP 0xd8 101 #define TRAP_PER_CPU_IRQ_WORKLIST_PA 0xe0 102 #define TRAP_PER_CPU_CPU_MONDO_QMASK 0xe8 103 #define TRAP_PER_CPU_DEV_MONDO_QMASK 0xec 104 #define TRAP_PER_CPU_RESUM_QMASK 0xf0 105 #define TRAP_PER_CPU_NONRESUM_QMASK 0xf4 106 #define TRAP_PER_CPU_PER_CPU_BASE 0xf8 107 108 #define TRAP_BLOCK_SZ_SHIFT 8 109 110 #include <asm/scratchpad.h> 111 112 #define __GET_CPUID(REG) \ 113 /* Spitfire implementation (default). */ \ 114 661: ldxa [%g0] ASI_UPA_CONFIG, REG; \ 115 srlx REG, 17, REG; \ 116 and REG, 0x1f, REG; \ 117 nop; \ 118 .section .cpuid_patch, "ax"; \ 119 /* Instruction location. */ \ 120 .word 661b; \ 121 /* Cheetah Safari implementation. */ \ 122 ldxa [%g0] ASI_SAFARI_CONFIG, REG; \ 123 srlx REG, 17, REG; \ 124 and REG, 0x3ff, REG; \ 125 nop; \ 126 /* Cheetah JBUS implementation. */ \ 127 ldxa [%g0] ASI_JBUS_CONFIG, REG; \ 128 srlx REG, 17, REG; \ 129 and REG, 0x1f, REG; \ 130 nop; \ 131 /* Starfire implementation. */ \ 132 sethi %hi(0x1fff40000d0 >> 9), REG; \ 133 sllx REG, 9, REG; \ 134 or REG, 0xd0, REG; \ 135 lduwa [REG] ASI_PHYS_BYPASS_EC_E, REG;\ 136 /* sun4v implementation. */ \ 137 mov SCRATCHPAD_CPUID, REG; \ 138 ldxa [REG] ASI_SCRATCHPAD, REG; \ 139 nop; \ 140 nop; \ 141 .previous; 142 143 #ifdef CONFIG_SMP 144 145 #define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 146 __GET_CPUID(TMP) \ 147 sethi %hi(trap_block), DEST; \ 148 sllx TMP, TRAP_BLOCK_SZ_SHIFT, TMP; \ 149 or DEST, %lo(trap_block), DEST; \ 150 add DEST, TMP, DEST; \ 151 152 /* Clobbers TMP, current address space PGD phys address into DEST. */ 153 #define TRAP_LOAD_PGD_PHYS(DEST, TMP) \ 154 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 155 ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST; 156 157 /* Clobbers TMP, loads local processor's IRQ work area into DEST. */ 158 #define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP) \ 159 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 160 add DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST; 161 162 /* Clobbers TMP, loads DEST with current thread info pointer. */ 163 #define TRAP_LOAD_THREAD_REG(DEST, TMP) \ 164 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 165 ldx [DEST + TRAP_PER_CPU_THREAD], DEST; 166 167 /* Given the current thread info pointer in THR, load the per-cpu 168 * area base of the current processor into DEST. REG1, REG2, and REG3 are 169 * clobbered. 170 * 171 * You absolutely cannot use DEST as a temporary in this code. The 172 * reason is that traps can happen during execution, and return from 173 * trap will load the fully resolved DEST per-cpu base. This can corrupt 174 * the calculations done by the macro mid-stream. 175 */ 176 #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3) \ 177 lduh [THR + TI_CPU], REG1; \ 178 sethi %hi(trap_block), REG2; \ 179 sllx REG1, TRAP_BLOCK_SZ_SHIFT, REG1; \ 180 or REG2, %lo(trap_block), REG2; \ 181 add REG2, REG1, REG2; \ 182 ldx [REG2 + TRAP_PER_CPU_PER_CPU_BASE], DEST; 183 184 #else 185 186 #define TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 187 sethi %hi(trap_block), DEST; \ 188 or DEST, %lo(trap_block), DEST; \ 189 190 /* Uniprocessor versions, we know the cpuid is zero. */ 191 #define TRAP_LOAD_PGD_PHYS(DEST, TMP) \ 192 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 193 ldx [DEST + TRAP_PER_CPU_PGD_PADDR], DEST; 194 195 /* Clobbers TMP, loads local processor's IRQ work area into DEST. */ 196 #define TRAP_LOAD_IRQ_WORK_PA(DEST, TMP) \ 197 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 198 add DEST, TRAP_PER_CPU_IRQ_WORKLIST_PA, DEST; 199 200 #define TRAP_LOAD_THREAD_REG(DEST, TMP) \ 201 TRAP_LOAD_TRAP_BLOCK(DEST, TMP) \ 202 ldx [DEST + TRAP_PER_CPU_THREAD], DEST; 203 204 /* No per-cpu areas on uniprocessor, so no need to load DEST. */ 205 #define LOAD_PER_CPU_BASE(DEST, THR, REG1, REG2, REG3) 206 207 #endif /* !(CONFIG_SMP) */ 208 209 #endif /* _SPARC_TRAP_BLOCK_H */ 210