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 <linux/jump_label.h> 13#include <asm/ppc_asm.h> 14#include <asm/hvcall.h> 15#include <asm/asm-offsets.h> 16#include <asm/opal.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 cmpdi r12,0; \ 44 bne- LABEL; \ 451: 46 47#endif 48 49#else 50#define OPAL_BRANCH(LABEL) 51#endif 52 53/* TODO: 54 * 55 * - Trace irqs in/off (needs saving/restoring all args, argh...) 56 * - Get r11 feed up by Dave so I can have better register usage 57 */ 58 59#define OPAL_CALL(name, token) \ 60 _GLOBAL_TOC(name); \ 61 mflr r0; \ 62 std r0,16(r1); \ 63 li r0,token; \ 64 OPAL_BRANCH(opal_tracepoint_entry) \ 65 mfcr r12; \ 66 stw r12,8(r1); \ 67 std r1,PACAR1(r13); \ 68 li r11,0; \ 69 mfmsr r12; \ 70 ori r11,r11,MSR_EE; \ 71 std r12,PACASAVEDMSR(r13); \ 72 andc r12,r12,r11; \ 73 mtmsrd r12,1; \ 74 LOAD_REG_ADDR(r11,opal_return); \ 75 mtlr r11; \ 76 li r11,MSR_DR|MSR_IR|MSR_LE;\ 77 andc r12,r12,r11; \ 78 mtspr SPRN_HSRR1,r12; \ 79 LOAD_REG_ADDR(r11,opal); \ 80 ld r12,8(r11); \ 81 ld r2,0(r11); \ 82 mtspr SPRN_HSRR0,r12; \ 83 hrfid 84 85opal_return: 86 /* 87 * Fixup endian on OPAL return... we should be able to simplify 88 * this by instead converting the below trampoline to a set of 89 * bytes (always BE) since MSR:LE will end up fixed up as a side 90 * effect of the rfid. 91 */ 92 FIXUP_ENDIAN 93 ld r2,PACATOC(r13); 94 lwz r4,8(r1); 95 ld r5,16(r1); 96 ld r6,PACASAVEDMSR(r13); 97 mtspr SPRN_SRR0,r5; 98 mtspr SPRN_SRR1,r6; 99 mtcr r4; 100 rfid 101 102#ifdef CONFIG_TRACEPOINTS 103opal_tracepoint_entry: 104 stdu r1,-STACKFRAMESIZE(r1) 105 std r0,STK_REG(R23)(r1) 106 std r3,STK_REG(R24)(r1) 107 std r4,STK_REG(R25)(r1) 108 std r5,STK_REG(R26)(r1) 109 std r6,STK_REG(R27)(r1) 110 std r7,STK_REG(R28)(r1) 111 std r8,STK_REG(R29)(r1) 112 std r9,STK_REG(R30)(r1) 113 std r10,STK_REG(R31)(r1) 114 mr r3,r0 115 addi r4,r1,STK_REG(R24) 116 bl __trace_opal_entry 117 ld r0,STK_REG(R23)(r1) 118 ld r3,STK_REG(R24)(r1) 119 ld r4,STK_REG(R25)(r1) 120 ld r5,STK_REG(R26)(r1) 121 ld r6,STK_REG(R27)(r1) 122 ld r7,STK_REG(R28)(r1) 123 ld r8,STK_REG(R29)(r1) 124 ld r9,STK_REG(R30)(r1) 125 ld r10,STK_REG(R31)(r1) 126 LOAD_REG_ADDR(r11,opal_tracepoint_return) 127 mfcr r12 128 std r11,16(r1) 129 stw r12,8(r1) 130 std r1,PACAR1(r13) 131 li r11,0 132 mfmsr r12 133 ori r11,r11,MSR_EE 134 std r12,PACASAVEDMSR(r13) 135 andc r12,r12,r11 136 mtmsrd r12,1 137 LOAD_REG_ADDR(r11,opal_return) 138 mtlr r11 139 li r11,MSR_DR|MSR_IR|MSR_LE 140 andc r12,r12,r11 141 mtspr SPRN_HSRR1,r12 142 LOAD_REG_ADDR(r11,opal) 143 ld r12,8(r11) 144 ld r2,0(r11) 145 mtspr SPRN_HSRR0,r12 146 hrfid 147 148opal_tracepoint_return: 149 std r3,STK_REG(R31)(r1) 150 mr r4,r3 151 ld r0,STK_REG(R23)(r1) 152 bl __trace_opal_exit 153 ld r3,STK_REG(R31)(r1) 154 addi r1,r1,STACKFRAMESIZE 155 ld r0,16(r1) 156 mtlr r0 157 blr 158#endif 159 160/* 161 * Make opal call in realmode. This is a generic function to be called 162 * from realmode. It handles endianness. 163 * 164 * r13 - paca pointer 165 * r1 - stack pointer 166 * r0 - opal token 167 */ 168_GLOBAL(opal_call_realmode) 169 mflr r12 170 std r12,PPC_LR_STKOFF(r1) 171 ld r2,PACATOC(r13) 172 /* Set opal return address */ 173 LOAD_REG_ADDR(r12,return_from_opal_call) 174 mtlr r12 175 176 mfmsr r12 177#ifdef __LITTLE_ENDIAN__ 178 /* Handle endian-ness */ 179 li r11,MSR_LE 180 andc r12,r12,r11 181#endif 182 mtspr SPRN_HSRR1,r12 183 LOAD_REG_ADDR(r11,opal) 184 ld r12,8(r11) 185 ld r2,0(r11) 186 mtspr SPRN_HSRR0,r12 187 hrfid 188 189return_from_opal_call: 190#ifdef __LITTLE_ENDIAN__ 191 FIXUP_ENDIAN 192#endif 193 ld r12,PPC_LR_STKOFF(r1) 194 mtlr r12 195 blr 196 197OPAL_CALL(opal_invalid_call, OPAL_INVALID_CALL); 198OPAL_CALL(opal_console_write, OPAL_CONSOLE_WRITE); 199OPAL_CALL(opal_console_read, OPAL_CONSOLE_READ); 200OPAL_CALL(opal_console_write_buffer_space, OPAL_CONSOLE_WRITE_BUFFER_SPACE); 201OPAL_CALL(opal_rtc_read, OPAL_RTC_READ); 202OPAL_CALL(opal_rtc_write, OPAL_RTC_WRITE); 203OPAL_CALL(opal_cec_power_down, OPAL_CEC_POWER_DOWN); 204OPAL_CALL(opal_cec_reboot, OPAL_CEC_REBOOT); 205OPAL_CALL(opal_cec_reboot2, OPAL_CEC_REBOOT2); 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_get_dpo_status, OPAL_GET_DPO_STATUS); 254OPAL_CALL(opal_set_system_attention_led, OPAL_SET_SYSTEM_ATTENTION_LED); 255OPAL_CALL(opal_pci_next_error, OPAL_PCI_NEXT_ERROR); 256OPAL_CALL(opal_pci_poll, OPAL_PCI_POLL); 257OPAL_CALL(opal_pci_msi_eoi, OPAL_PCI_MSI_EOI); 258OPAL_CALL(opal_pci_get_phb_diag_data2, OPAL_PCI_GET_PHB_DIAG_DATA2); 259OPAL_CALL(opal_xscom_read, OPAL_XSCOM_READ); 260OPAL_CALL(opal_xscom_write, OPAL_XSCOM_WRITE); 261OPAL_CALL(opal_lpc_read, OPAL_LPC_READ); 262OPAL_CALL(opal_lpc_write, OPAL_LPC_WRITE); 263OPAL_CALL(opal_return_cpu, OPAL_RETURN_CPU); 264OPAL_CALL(opal_reinit_cpus, OPAL_REINIT_CPUS); 265OPAL_CALL(opal_read_elog, OPAL_ELOG_READ); 266OPAL_CALL(opal_send_ack_elog, OPAL_ELOG_ACK); 267OPAL_CALL(opal_get_elog_size, OPAL_ELOG_SIZE); 268OPAL_CALL(opal_resend_pending_logs, OPAL_ELOG_RESEND); 269OPAL_CALL(opal_write_elog, OPAL_ELOG_WRITE); 270OPAL_CALL(opal_validate_flash, OPAL_FLASH_VALIDATE); 271OPAL_CALL(opal_manage_flash, OPAL_FLASH_MANAGE); 272OPAL_CALL(opal_update_flash, OPAL_FLASH_UPDATE); 273OPAL_CALL(opal_resync_timebase, OPAL_RESYNC_TIMEBASE); 274OPAL_CALL(opal_check_token, OPAL_CHECK_TOKEN); 275OPAL_CALL(opal_dump_init, OPAL_DUMP_INIT); 276OPAL_CALL(opal_dump_info, OPAL_DUMP_INFO); 277OPAL_CALL(opal_dump_info2, OPAL_DUMP_INFO2); 278OPAL_CALL(opal_dump_read, OPAL_DUMP_READ); 279OPAL_CALL(opal_dump_ack, OPAL_DUMP_ACK); 280OPAL_CALL(opal_get_msg, OPAL_GET_MSG); 281OPAL_CALL(opal_check_completion, OPAL_CHECK_ASYNC_COMPLETION); 282OPAL_CALL(opal_dump_resend_notification, OPAL_DUMP_RESEND); 283OPAL_CALL(opal_sync_host_reboot, OPAL_SYNC_HOST_REBOOT); 284OPAL_CALL(opal_sensor_read, OPAL_SENSOR_READ); 285OPAL_CALL(opal_get_param, OPAL_GET_PARAM); 286OPAL_CALL(opal_set_param, OPAL_SET_PARAM); 287OPAL_CALL(opal_handle_hmi, OPAL_HANDLE_HMI); 288OPAL_CALL(opal_config_cpu_idle_state, OPAL_CONFIG_CPU_IDLE_STATE); 289OPAL_CALL(opal_slw_set_reg, OPAL_SLW_SET_REG); 290OPAL_CALL(opal_register_dump_region, OPAL_REGISTER_DUMP_REGION); 291OPAL_CALL(opal_unregister_dump_region, OPAL_UNREGISTER_DUMP_REGION); 292OPAL_CALL(opal_pci_set_phb_cxl_mode, OPAL_PCI_SET_PHB_CAPI_MODE); 293OPAL_CALL(opal_tpo_write, OPAL_WRITE_TPO); 294OPAL_CALL(opal_tpo_read, OPAL_READ_TPO); 295OPAL_CALL(opal_ipmi_send, OPAL_IPMI_SEND); 296OPAL_CALL(opal_ipmi_recv, OPAL_IPMI_RECV); 297OPAL_CALL(opal_i2c_request, OPAL_I2C_REQUEST); 298OPAL_CALL(opal_flash_read, OPAL_FLASH_READ); 299OPAL_CALL(opal_flash_write, OPAL_FLASH_WRITE); 300OPAL_CALL(opal_flash_erase, OPAL_FLASH_ERASE); 301OPAL_CALL(opal_prd_msg, OPAL_PRD_MSG); 302OPAL_CALL(opal_leds_get_ind, OPAL_LEDS_GET_INDICATOR); 303OPAL_CALL(opal_leds_set_ind, OPAL_LEDS_SET_INDICATOR); 304