arch/powerpc/platforms/powernv/opal-wrappers.S

   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
  17 /* TODO:
  18  *
  19  * - Trace irqs in/off (needs saving/restoring all args, argh...)
  20  * - Get r11 feed up by Dave so I can have better register usage
  21  */
  22 #define OPAL_CALL(name, token)          \
  23  _GLOBAL(name);                         \
  24         mflr    r0;                     \
  25         mfcr    r12;                    \
  26         std     r0,16(r1);              \
  27         std     r12,8(r1);              \
  28         std     r1,PACAR1(r13);         \
  29         li      r0,0;                   \
  30         mfmsr   r12;                    \
  31         ori     r0,r0,MSR_EE;           \
  32         std     r12,PACASAVEDMSR(r13);  \
  33         andc    r12,r12,r0;             \
  34         mtmsrd  r12,1;                  \
  35         LOAD_REG_ADDR(r0,.opal_return); \
  36         mtlr    r0;                     \
  37         li      r0,MSR_DR|MSR_IR|MSR_LE;\
  38         andc    r12,r12,r0;             \
  39         li      r0,token;               \
  40         mtspr   SPRN_HSRR1,r12;         \
  41         LOAD_REG_ADDR(r11,opal);        \
  42         ld      r12,8(r11);             \
  43         ld      r2,0(r11);              \
  44         mtspr   SPRN_HSRR0,r12;         \
  45         hrfid
  46
  47 _STATIC(opal_return)
  48         /*
  49          * Fixup endian on OPAL return... we should be able to simplify
  50          * this by instead converting the below trampoline to a set of
  51          * bytes (always BE) since MSR:LE will end up fixed up as a side
  52          * effect of the rfid.
  53          */
  54         FIXUP_ENDIAN
  55         ld      r2,PACATOC(r13);
  56         ld      r4,8(r1);
  57         ld      r5,16(r1);
  58         ld      r6,PACASAVEDMSR(r13);
  59         mtspr   SPRN_SRR0,r5;
  60         mtspr   SPRN_SRR1,r6;
  61         mtcr    r4;
  62         rfid
  63
  64 OPAL_CALL(opal_console_write,                   OPAL_CONSOLE_WRITE);
  65 OPAL_CALL(opal_console_read,                    OPAL_CONSOLE_READ);
  66 OPAL_CALL(opal_console_write_buffer_space,      OPAL_CONSOLE_WRITE_BUFFER_SPACE);
  67 OPAL_CALL(opal_rtc_read,                        OPAL_RTC_READ);
  68 OPAL_CALL(opal_rtc_write,                       OPAL_RTC_WRITE);
  69 OPAL_CALL(opal_cec_power_down,                  OPAL_CEC_POWER_DOWN);
  70 OPAL_CALL(opal_cec_reboot,                      OPAL_CEC_REBOOT);
  71 OPAL_CALL(opal_read_nvram,                      OPAL_READ_NVRAM);
  72 OPAL_CALL(opal_write_nvram,                     OPAL_WRITE_NVRAM);
  73 OPAL_CALL(opal_handle_interrupt,                OPAL_HANDLE_INTERRUPT);
  74 OPAL_CALL(opal_poll_events,                     OPAL_POLL_EVENTS);
  75 OPAL_CALL(opal_pci_set_hub_tce_memory,          OPAL_PCI_SET_HUB_TCE_MEMORY);
  76 OPAL_CALL(opal_pci_set_phb_tce_memory,          OPAL_PCI_SET_PHB_TCE_MEMORY);
  77 OPAL_CALL(opal_pci_config_read_byte,            OPAL_PCI_CONFIG_READ_BYTE);
  78 OPAL_CALL(opal_pci_config_read_half_word,       OPAL_PCI_CONFIG_READ_HALF_WORD);
  79 OPAL_CALL(opal_pci_config_read_word,            OPAL_PCI_CONFIG_READ_WORD);
  80 OPAL_CALL(opal_pci_config_write_byte,           OPAL_PCI_CONFIG_WRITE_BYTE);
  81 OPAL_CALL(opal_pci_config_write_half_word,      OPAL_PCI_CONFIG_WRITE_HALF_WORD);
  82 OPAL_CALL(opal_pci_config_write_word,           OPAL_PCI_CONFIG_WRITE_WORD);
  83 OPAL_CALL(opal_set_xive,                        OPAL_SET_XIVE);
  84 OPAL_CALL(opal_get_xive,                        OPAL_GET_XIVE);
  85 OPAL_CALL(opal_register_exception_handler,      OPAL_REGISTER_OPAL_EXCEPTION_HANDLER);
  86 OPAL_CALL(opal_pci_eeh_freeze_status,           OPAL_PCI_EEH_FREEZE_STATUS);
  87 OPAL_CALL(opal_pci_eeh_freeze_clear,            OPAL_PCI_EEH_FREEZE_CLEAR);
  88 OPAL_CALL(opal_pci_shpc,                        OPAL_PCI_SHPC);
  89 OPAL_CALL(opal_pci_phb_mmio_enable,             OPAL_PCI_PHB_MMIO_ENABLE);
  90 OPAL_CALL(opal_pci_set_phb_mem_window,          OPAL_PCI_SET_PHB_MEM_WINDOW);
  91 OPAL_CALL(opal_pci_map_pe_mmio_window,          OPAL_PCI_MAP_PE_MMIO_WINDOW);
  92 OPAL_CALL(opal_pci_set_phb_table_memory,        OPAL_PCI_SET_PHB_TABLE_MEMORY);
  93 OPAL_CALL(opal_pci_set_pe,                      OPAL_PCI_SET_PE);
  94 OPAL_CALL(opal_pci_set_peltv,                   OPAL_PCI_SET_PELTV);
  95 OPAL_CALL(opal_pci_set_mve,                     OPAL_PCI_SET_MVE);
  96 OPAL_CALL(opal_pci_set_mve_enable,              OPAL_PCI_SET_MVE_ENABLE);
  97 OPAL_CALL(opal_pci_get_xive_reissue,            OPAL_PCI_GET_XIVE_REISSUE);
  98 OPAL_CALL(opal_pci_set_xive_reissue,            OPAL_PCI_SET_XIVE_REISSUE);
  99 OPAL_CALL(opal_pci_set_xive_pe,                 OPAL_PCI_SET_XIVE_PE);
 100 OPAL_CALL(opal_get_xive_source,                 OPAL_GET_XIVE_SOURCE);
 101 OPAL_CALL(opal_get_msi_32,                      OPAL_GET_MSI_32);
 102 OPAL_CALL(opal_get_msi_64,                      OPAL_GET_MSI_64);
 103 OPAL_CALL(opal_start_cpu,                       OPAL_START_CPU);
 104 OPAL_CALL(opal_query_cpu_status,                OPAL_QUERY_CPU_STATUS);
 105 OPAL_CALL(opal_write_oppanel,                   OPAL_WRITE_OPPANEL);
 106 OPAL_CALL(opal_pci_map_pe_dma_window,           OPAL_PCI_MAP_PE_DMA_WINDOW);
 107 OPAL_CALL(opal_pci_map_pe_dma_window_real,      OPAL_PCI_MAP_PE_DMA_WINDOW_REAL);
 108 OPAL_CALL(opal_pci_reset,                       OPAL_PCI_RESET);
 109 OPAL_CALL(opal_pci_get_hub_diag_data,           OPAL_PCI_GET_HUB_DIAG_DATA);
 110 OPAL_CALL(opal_pci_get_phb_diag_data,           OPAL_PCI_GET_PHB_DIAG_DATA);
 111 OPAL_CALL(opal_pci_fence_phb,                   OPAL_PCI_FENCE_PHB);
 112 OPAL_CALL(opal_pci_reinit,                      OPAL_PCI_REINIT);
 113 OPAL_CALL(opal_pci_mask_pe_error,               OPAL_PCI_MASK_PE_ERROR);
 114 OPAL_CALL(opal_set_slot_led_status,             OPAL_SET_SLOT_LED_STATUS);
 115 OPAL_CALL(opal_get_epow_status,                 OPAL_GET_EPOW_STATUS);
 116 OPAL_CALL(opal_set_system_attention_led,        OPAL_SET_SYSTEM_ATTENTION_LED);
 117 OPAL_CALL(opal_pci_next_error,                  OPAL_PCI_NEXT_ERROR);
 118 OPAL_CALL(opal_pci_poll,                        OPAL_PCI_POLL);
 119 OPAL_CALL(opal_pci_msi_eoi,                     OPAL_PCI_MSI_EOI);
 120 OPAL_CALL(opal_pci_get_phb_diag_data2,          OPAL_PCI_GET_PHB_DIAG_DATA2);
 121 OPAL_CALL(opal_xscom_read,                      OPAL_XSCOM_READ);
 122 OPAL_CALL(opal_xscom_write,                     OPAL_XSCOM_WRITE);
 123 OPAL_CALL(opal_lpc_read,                        OPAL_LPC_READ);
 124 OPAL_CALL(opal_lpc_write,                       OPAL_LPC_WRITE);
 125 OPAL_CALL(opal_return_cpu,                      OPAL_RETURN_CPU);