1/* 2 * PowerNV OPAL API wrappers 3 * 4 * Copyright 2011 IBM Corp. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12#include <asm/ppc_asm.h> 13#include <asm/hvcall.h> 14#include <asm/asm-offsets.h> 15#include <asm/opal.h> 16#include <asm/jump_label.h> 17 18 .section ".text" 19 20#ifdef CONFIG_TRACEPOINTS 21#ifdef HAVE_JUMP_LABEL 22#define OPAL_BRANCH(LABEL) \ 23 ARCH_STATIC_BRANCH(LABEL, opal_tracepoint_key) 24#else 25 26 .section ".toc","aw" 27 28 .globl opal_tracepoint_refcount 29opal_tracepoint_refcount: 30 .llong 0 31 32 .section ".text" 33 34/* 35 * We branch around this in early init by using an unconditional cpu 36 * feature. 37 */ 38#define OPAL_BRANCH(LABEL) \ 39BEGIN_FTR_SECTION; \ 40 b 1f; \ 41END_FTR_SECTION(0, 1); \ 42 ld r12,opal_tracepoint_refcount@toc(r2); \ 43 std r12,32(r1); \ 44 cmpdi r12,0; \ 45 bne- LABEL; \ 461: 47 48#endif 49 50#else 51#define OPAL_BRANCH(LABEL) 52#endif 53 54/* TODO: 55 * 56 * - Trace irqs in/off (needs saving/restoring all args, argh...) 57 * - Get r11 feed up by Dave so I can have better register usage 58 */ 59 60#define OPAL_CALL(name, token) \ 61 _GLOBAL_TOC(name); \ 62 mflr r0; \ 63 std r0,16(r1); \ 64 li r0,token; \ 65 OPAL_BRANCH(opal_tracepoint_entry) \ 66 mfcr r12; \ 67 stw r12,8(r1); \ 68 std r1,PACAR1(r13); \ 69 li r11,0; \ 70 mfmsr r12; \ 71 ori r11,r11,MSR_EE; \ 72 std r12,PACASAVEDMSR(r13); \ 73 andc r12,r12,r11; \ 74 mtmsrd r12,1; \ 75 LOAD_REG_ADDR(r11,opal_return); \ 76 mtlr r11; \ 77 li r11,MSR_DR|MSR_IR|MSR_LE;\ 78 andc r12,r12,r11; \ 79 mtspr SPRN_HSRR1,r12; \ 80 LOAD_REG_ADDR(r11,opal); \ 81 ld r12,8(r11); \ 82 ld r2,0(r11); \ 83 mtspr SPRN_HSRR0,r12; \ 84 hrfid 85 86opal_return: 87 /* 88 * Fixup endian on OPAL return... we should be able to simplify 89 * this by instead converting the below trampoline to a set of 90 * bytes (always BE) since MSR:LE will end up fixed up as a side 91 * effect of the rfid. 92 */ 93 FIXUP_ENDIAN 94 ld r2,PACATOC(r13); 95 lwz r4,8(r1); 96 ld r5,16(r1); 97 ld r6,PACASAVEDMSR(r13); 98 mtspr SPRN_SRR0,r5; 99 mtspr SPRN_SRR1,r6; 100 mtcr r4; 101 rfid 102 103#ifdef CONFIG_TRACEPOINTS 104opal_tracepoint_entry: 105 stdu r1,-STACKFRAMESIZE(r1) 106 std r0,STK_REG(R23)(r1) 107 std r3,STK_REG(R24)(r1) 108 std r4,STK_REG(R25)(r1) 109 std r5,STK_REG(R26)(r1) 110 std r6,STK_REG(R27)(r1) 111 std r7,STK_REG(R28)(r1) 112 std r8,STK_REG(R29)(r1) 113 std r9,STK_REG(R30)(r1) 114 std r10,STK_REG(R31)(r1) 115 mr r3,r0 116 addi r4,r1,STK_REG(R24) 117 bl __trace_opal_entry 118 ld r0,STK_REG(R23)(r1) 119 ld r3,STK_REG(R24)(r1) 120 ld r4,STK_REG(R25)(r1) 121 ld r5,STK_REG(R26)(r1) 122 ld r6,STK_REG(R27)(r1) 123 ld r7,STK_REG(R28)(r1) 124 ld r8,STK_REG(R29)(r1) 125 ld r9,STK_REG(R30)(r1) 126 ld r10,STK_REG(R31)(r1) 127 LOAD_REG_ADDR(r11,opal_tracepoint_return) 128 mfcr r12 129 std r11,16(r1) 130 stw r12,8(r1) 131 std r1,PACAR1(r13) 132 li r11,0 133 mfmsr r12 134 ori r11,r11,MSR_EE 135 std r12,PACASAVEDMSR(r13) 136 andc r12,r12,r11 137 mtmsrd r12,1 138 LOAD_REG_ADDR(r11,opal_return) 139 mtlr r11 140 li r11,MSR_DR|MSR_IR|MSR_LE 141 andc r12,r12,r11 142 mtspr SPRN_HSRR1,r12 143 LOAD_REG_ADDR(r11,opal) 144 ld r12,8(r11) 145 ld r2,0(r11) 146 mtspr SPRN_HSRR0,r12 147 hrfid 148 149opal_tracepoint_return: 150 std r3,STK_REG(R31)(r1) 151 mr r4,r3 152 ld r0,STK_REG(R23)(r1) 153 bl __trace_opal_exit 154 ld r3,STK_REG(R31)(r1) 155 addi r1,r1,STACKFRAMESIZE 156 ld r0,16(r1) 157 mtlr r0 158 blr 159#endif 160 161/* 162 * Make opal call in realmode. This is a generic function to be called 163 * from realmode. It handles endianness. 164 * 165 * r13 - paca pointer 166 * r1 - stack pointer 167 * r0 - opal token 168 */ 169_GLOBAL(opal_call_realmode) 170 mflr r12 171 std r12,PPC_LR_STKOFF(r1) 172 ld r2,PACATOC(r13) 173 /* Set opal return address */ 174 LOAD_REG_ADDR(r12,return_from_opal_call) 175 mtlr r12 176 177 mfmsr r12 178#ifdef __LITTLE_ENDIAN__ 179 /* Handle endian-ness */ 180 li r11,MSR_LE 181 andc r12,r12,r11 182#endif 183 mtspr SPRN_HSRR1,r12 184 LOAD_REG_ADDR(r11,opal) 185 ld r12,8(r11) 186 ld r2,0(r11) 187 mtspr SPRN_HSRR0,r12 188 hrfid 189 190return_from_opal_call: 191#ifdef __LITTLE_ENDIAN__ 192 FIXUP_ENDIAN 193#endif 194 ld r12,PPC_LR_STKOFF(r1) 195 mtlr r12 196 blr 197 198OPAL_CALL(opal_invalid_call, OPAL_INVALID_CALL); 199OPAL_CALL(opal_console_write, OPAL_CONSOLE_WRITE); 200OPAL_CALL(opal_console_read, OPAL_CONSOLE_READ); 201OPAL_CALL(opal_console_write_buffer_space, OPAL_CONSOLE_WRITE_BUFFER_SPACE); 202OPAL_CALL(opal_rtc_read, OPAL_RTC_READ); 203OPAL_CALL(opal_rtc_write, OPAL_RTC_WRITE); 204OPAL_CALL(opal_cec_power_down, OPAL_CEC_POWER_DOWN); 205OPAL_CALL(opal_cec_reboot, OPAL_CEC_REBOOT); 206OPAL_CALL(opal_read_nvram, OPAL_READ_NVRAM); 207OPAL_CALL(opal_write_nvram, OPAL_WRITE_NVRAM); 208OPAL_CALL(opal_handle_interrupt, OPAL_HANDLE_INTERRUPT); 209OPAL_CALL(opal_poll_events, OPAL_POLL_EVENTS); 210OPAL_CALL(opal_pci_set_hub_tce_memory, OPAL_PCI_SET_HUB_TCE_MEMORY); 211OPAL_CALL(opal_pci_set_phb_tce_memory, OPAL_PCI_SET_PHB_TCE_MEMORY); 212OPAL_CALL(opal_pci_config_read_byte, OPAL_PCI_CONFIG_READ_BYTE); 213OPAL_CALL(opal_pci_config_read_half_word, OPAL_PCI_CONFIG_READ_HALF_WORD); 214OPAL_CALL(opal_pci_config_read_word, OPAL_PCI_CONFIG_READ_WORD); 215OPAL_CALL(opal_pci_config_write_byte, OPAL_PCI_CONFIG_WRITE_BYTE); 216OPAL_CALL(opal_pci_config_write_half_word, OPAL_PCI_CONFIG_WRITE_HALF_WORD); 217OPAL_CALL(opal_pci_config_write_word, OPAL_PCI_CONFIG_WRITE_WORD); 218OPAL_CALL(opal_set_xive, OPAL_SET_XIVE); 219OPAL_CALL(opal_get_xive, OPAL_GET_XIVE); 220OPAL_CALL(opal_register_exception_handler, OPAL_REGISTER_OPAL_EXCEPTION_HANDLER); 221OPAL_CALL(opal_pci_eeh_freeze_status, OPAL_PCI_EEH_FREEZE_STATUS); 222OPAL_CALL(opal_pci_eeh_freeze_clear, OPAL_PCI_EEH_FREEZE_CLEAR); 223OPAL_CALL(opal_pci_eeh_freeze_set, OPAL_PCI_EEH_FREEZE_SET); 224OPAL_CALL(opal_pci_err_inject, OPAL_PCI_ERR_INJECT); 225OPAL_CALL(opal_pci_shpc, OPAL_PCI_SHPC); 226OPAL_CALL(opal_pci_phb_mmio_enable, OPAL_PCI_PHB_MMIO_ENABLE); 227OPAL_CALL(opal_pci_set_phb_mem_window, OPAL_PCI_SET_PHB_MEM_WINDOW); 228OPAL_CALL(opal_pci_map_pe_mmio_window, OPAL_PCI_MAP_PE_MMIO_WINDOW); 229OPAL_CALL(opal_pci_set_phb_table_memory, OPAL_PCI_SET_PHB_TABLE_MEMORY); 230OPAL_CALL(opal_pci_set_pe, OPAL_PCI_SET_PE); 231OPAL_CALL(opal_pci_set_peltv, OPAL_PCI_SET_PELTV); 232OPAL_CALL(opal_pci_set_mve, OPAL_PCI_SET_MVE); 233OPAL_CALL(opal_pci_set_mve_enable, OPAL_PCI_SET_MVE_ENABLE); 234OPAL_CALL(opal_pci_get_xive_reissue, OPAL_PCI_GET_XIVE_REISSUE); 235OPAL_CALL(opal_pci_set_xive_reissue, OPAL_PCI_SET_XIVE_REISSUE); 236OPAL_CALL(opal_pci_set_xive_pe, OPAL_PCI_SET_XIVE_PE); 237OPAL_CALL(opal_get_xive_source, OPAL_GET_XIVE_SOURCE); 238OPAL_CALL(opal_get_msi_32, OPAL_GET_MSI_32); 239OPAL_CALL(opal_get_msi_64, OPAL_GET_MSI_64); 240OPAL_CALL(opal_start_cpu, OPAL_START_CPU); 241OPAL_CALL(opal_query_cpu_status, OPAL_QUERY_CPU_STATUS); 242OPAL_CALL(opal_write_oppanel, OPAL_WRITE_OPPANEL); 243OPAL_CALL(opal_pci_map_pe_dma_window, OPAL_PCI_MAP_PE_DMA_WINDOW); 244OPAL_CALL(opal_pci_map_pe_dma_window_real, OPAL_PCI_MAP_PE_DMA_WINDOW_REAL); 245OPAL_CALL(opal_pci_reset, OPAL_PCI_RESET); 246OPAL_CALL(opal_pci_get_hub_diag_data, OPAL_PCI_GET_HUB_DIAG_DATA); 247OPAL_CALL(opal_pci_get_phb_diag_data, OPAL_PCI_GET_PHB_DIAG_DATA); 248OPAL_CALL(opal_pci_fence_phb, OPAL_PCI_FENCE_PHB); 249OPAL_CALL(opal_pci_reinit, OPAL_PCI_REINIT); 250OPAL_CALL(opal_pci_mask_pe_error, OPAL_PCI_MASK_PE_ERROR); 251OPAL_CALL(opal_set_slot_led_status, OPAL_SET_SLOT_LED_STATUS); 252OPAL_CALL(opal_get_epow_status, OPAL_GET_EPOW_STATUS); 253OPAL_CALL(opal_set_system_attention_led, OPAL_SET_SYSTEM_ATTENTION_LED); 254OPAL_CALL(opal_pci_next_error, OPAL_PCI_NEXT_ERROR); 255OPAL_CALL(opal_pci_poll, OPAL_PCI_POLL); 256OPAL_CALL(opal_pci_msi_eoi, OPAL_PCI_MSI_EOI); 257OPAL_CALL(opal_pci_get_phb_diag_data2, OPAL_PCI_GET_PHB_DIAG_DATA2); 258OPAL_CALL(opal_xscom_read, OPAL_XSCOM_READ); 259OPAL_CALL(opal_xscom_write, OPAL_XSCOM_WRITE); 260OPAL_CALL(opal_lpc_read, OPAL_LPC_READ); 261OPAL_CALL(opal_lpc_write, OPAL_LPC_WRITE); 262OPAL_CALL(opal_return_cpu, OPAL_RETURN_CPU); 263OPAL_CALL(opal_reinit_cpus, OPAL_REINIT_CPUS); 264OPAL_CALL(opal_read_elog, OPAL_ELOG_READ); 265OPAL_CALL(opal_send_ack_elog, OPAL_ELOG_ACK); 266OPAL_CALL(opal_get_elog_size, OPAL_ELOG_SIZE); 267OPAL_CALL(opal_resend_pending_logs, OPAL_ELOG_RESEND); 268OPAL_CALL(opal_write_elog, OPAL_ELOG_WRITE); 269OPAL_CALL(opal_validate_flash, OPAL_FLASH_VALIDATE); 270OPAL_CALL(opal_manage_flash, OPAL_FLASH_MANAGE); 271OPAL_CALL(opal_update_flash, OPAL_FLASH_UPDATE); 272OPAL_CALL(opal_resync_timebase, OPAL_RESYNC_TIMEBASE); 273OPAL_CALL(opal_check_token, OPAL_CHECK_TOKEN); 274OPAL_CALL(opal_dump_init, OPAL_DUMP_INIT); 275OPAL_CALL(opal_dump_info, OPAL_DUMP_INFO); 276OPAL_CALL(opal_dump_info2, OPAL_DUMP_INFO2); 277OPAL_CALL(opal_dump_read, OPAL_DUMP_READ); 278OPAL_CALL(opal_dump_ack, OPAL_DUMP_ACK); 279OPAL_CALL(opal_get_msg, OPAL_GET_MSG); 280OPAL_CALL(opal_check_completion, OPAL_CHECK_ASYNC_COMPLETION); 281OPAL_CALL(opal_dump_resend_notification, OPAL_DUMP_RESEND); 282OPAL_CALL(opal_sync_host_reboot, OPAL_SYNC_HOST_REBOOT); 283OPAL_CALL(opal_sensor_read, OPAL_SENSOR_READ); 284OPAL_CALL(opal_get_param, OPAL_GET_PARAM); 285OPAL_CALL(opal_set_param, OPAL_SET_PARAM); 286OPAL_CALL(opal_handle_hmi, OPAL_HANDLE_HMI); 287OPAL_CALL(opal_slw_set_reg, OPAL_SLW_SET_REG); 288OPAL_CALL(opal_register_dump_region, OPAL_REGISTER_DUMP_REGION); 289OPAL_CALL(opal_unregister_dump_region, OPAL_UNREGISTER_DUMP_REGION); 290OPAL_CALL(opal_pci_set_phb_cxl_mode, OPAL_PCI_SET_PHB_CXL_MODE); 291OPAL_CALL(opal_tpo_write, OPAL_WRITE_TPO); 292OPAL_CALL(opal_tpo_read, OPAL_READ_TPO); 293OPAL_CALL(opal_ipmi_send, OPAL_IPMI_SEND); 294OPAL_CALL(opal_ipmi_recv, OPAL_IPMI_RECV); 295OPAL_CALL(opal_i2c_request, OPAL_I2C_REQUEST); 296