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powerpc/powernv: Functions to get/set PCI slot state
[mirror_ubuntu-zesty-kernel.git] / arch / powerpc / platforms / powernv / opal-wrappers.S
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14a43e69
BH		 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
58995a9a 12#include <linux/jump_label.h>
14a43e69
BH		 13#include <asm/ppc_asm.h>
14#include <asm/hvcall.h>
15#include <asm/asm-offsets.h>
16#include <asm/opal.h>
c49f6353
AB		 17
18 .section ".text"
19
20#ifdef CONFIG_TRACEPOINTS
1bc9e47a 21#ifdef HAVE_JUMP_LABEL
c49f6353
AB		 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); \
c49f6353
AB		 43 cmpdi r12,0; \
44 bne- LABEL; \
451:
46
47#endif
48
49#else
50#define OPAL_BRANCH(LABEL)
51#endif
14a43e69
BH		 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 */
c49f6353 58
14a43e69 59#define OPAL_CALL(name, token) \
19d36c21 60 _GLOBAL_TOC(name); \
14a43e69 61 mflr r0; \
14a43e69 62 std r0,16(r1); \
c49f6353
AB		 63 li r0,token; \
64 OPAL_BRANCH(opal_tracepoint_entry) \
65 mfcr r12; \
bbe30b3b 66 stw r12,8(r1); \
14a43e69 67 std r1,PACAR1(r13); \
c49f6353 68 li r11,0; \
14a43e69 69 mfmsr r12; \
c49f6353 70 ori r11,r11,MSR_EE; \
14a43e69 71 std r12,PACASAVEDMSR(r13); \
c49f6353 72 andc r12,r12,r11; \
14a43e69 73 mtmsrd r12,1; \
c49f6353
AB		 74 LOAD_REG_ADDR(r11,opal_return); \
75 mtlr r11; \
76 li r11,MSR_DR|MSR_IR|MSR_LE;\
77 andc r12,r12,r11; \
14a43e69
BH		 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
ad0289e4 85opal_return:
be401b37
BH		 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
14a43e69 93 ld r2,PACATOC(r13);
bbe30b3b 94 lwz r4,8(r1);
14a43e69
BH		 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
c49f6353
AB		 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
7cba160a
SP		 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
e28b05e7 197OPAL_CALL(opal_invalid_call, OPAL_INVALID_CALL);
14a43e69
BH		 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);
e784b649 205OPAL_CALL(opal_cec_reboot2, OPAL_CEC_REBOOT2);
14a43e69
BH		 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);
5ca27efb 223OPAL_CALL(opal_pci_eeh_freeze_set, OPAL_PCI_EEH_FREEZE_SET);
5b642340 224OPAL_CALL(opal_pci_err_inject, OPAL_PCI_ERR_INJECT);
14a43e69
BH		 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);
f11fe552
BH		 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);
3b476aad 253OPAL_CALL(opal_get_dpo_status, OPAL_GET_DPO_STATUS);
f11fe552 254OPAL_CALL(opal_set_system_attention_led, OPAL_SET_SYSTEM_ATTENTION_LED);
23773230
GS		 255OPAL_CALL(opal_pci_next_error, OPAL_PCI_NEXT_ERROR);
256OPAL_CALL(opal_pci_poll, OPAL_PCI_POLL);
137436c9 257OPAL_CALL(opal_pci_msi_eoi, OPAL_PCI_MSI_EOI);
23773230 258OPAL_CALL(opal_pci_get_phb_diag_data2, OPAL_PCI_GET_PHB_DIAG_DATA2);
cc0efb57
BH		 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);
13906db6 263OPAL_CALL(opal_return_cpu, OPAL_RETURN_CPU);
4926616c 264OPAL_CALL(opal_reinit_cpus, OPAL_REINIT_CPUS);
774fea1a
SS		 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);
50bd6153
VH		 270OPAL_CALL(opal_validate_flash, OPAL_FLASH_VALIDATE);
271OPAL_CALL(opal_manage_flash, OPAL_FLASH_MANAGE);
272OPAL_CALL(opal_update_flash, OPAL_FLASH_UPDATE);
97eb001f 273OPAL_CALL(opal_resync_timebase, OPAL_RESYNC_TIMEBASE);
bffe6bda 274OPAL_CALL(opal_check_token, OPAL_CHECK_TOKEN);
c7e64b9c
SS		 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);
24366360
MS		 280OPAL_CALL(opal_get_msg, OPAL_GET_MSG);
281OPAL_CALL(opal_check_completion, OPAL_CHECK_ASYNC_COMPLETION);
c7e64b9c 282OPAL_CALL(opal_dump_resend_notification, OPAL_DUMP_RESEND);
f7d98d18 283OPAL_CALL(opal_sync_host_reboot, OPAL_SYNC_HOST_REBOOT);
7224adbb 284OPAL_CALL(opal_sensor_read, OPAL_SENSOR_READ);
4029cd66
NG		 285OPAL_CALL(opal_get_param, OPAL_GET_PARAM);
286OPAL_CALL(opal_set_param, OPAL_SET_PARAM);
0ef95b41 287OPAL_CALL(opal_handle_hmi, OPAL_HANDLE_HMI);
5703d2f4 288OPAL_CALL(opal_config_cpu_idle_state, OPAL_CONFIG_CPU_IDLE_STATE);
77b54e9f 289OPAL_CALL(opal_slw_set_reg, OPAL_SLW_SET_REG);
b09c2ec4
VH		 290OPAL_CALL(opal_register_dump_region, OPAL_REGISTER_DUMP_REGION);
291OPAL_CALL(opal_unregister_dump_region, OPAL_UNREGISTER_DUMP_REGION);
d7cf83fc 292OPAL_CALL(opal_pci_set_phb_cxl_mode, OPAL_PCI_SET_PHB_CAPI_MODE);
16b1d26e
NG		 293OPAL_CALL(opal_tpo_write, OPAL_WRITE_TPO);
294OPAL_CALL(opal_tpo_read, OPAL_READ_TPO);
608b286d
JK		 295OPAL_CALL(opal_ipmi_send, OPAL_IPMI_SEND);
296OPAL_CALL(opal_ipmi_recv, OPAL_IPMI_RECV);
47083450 297OPAL_CALL(opal_i2c_request, OPAL_I2C_REQUEST);
ed59190e
CB		 298OPAL_CALL(opal_flash_read, OPAL_FLASH_READ);
299OPAL_CALL(opal_flash_write, OPAL_FLASH_WRITE);
300OPAL_CALL(opal_flash_erase, OPAL_FLASH_ERASE);
0d7cd855 301OPAL_CALL(opal_prd_msg, OPAL_PRD_MSG);
8a8d9181
AK		 302OPAL_CALL(opal_leds_get_ind, OPAL_LEDS_GET_INDICATOR);
303OPAL_CALL(opal_leds_set_ind, OPAL_LEDS_SET_INDICATOR);
affddff6 304OPAL_CALL(opal_console_flush, OPAL_CONSOLE_FLUSH);
ea0d856c
GS		 305OPAL_CALL(opal_get_device_tree, OPAL_GET_DEVICE_TREE);
306OPAL_CALL(opal_pci_get_presence_state, OPAL_PCI_GET_PRESENCE_STATE);
307OPAL_CALL(opal_pci_get_power_state, OPAL_PCI_GET_POWER_STATE);
308OPAL_CALL(opal_pci_set_power_state, OPAL_PCI_SET_POWER_STATE);
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