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_read_nvram,			OPAL_READ_NVRAM);
206OPAL_CALL(opal_write_nvram,			OPAL_WRITE_NVRAM);
207OPAL_CALL(opal_handle_interrupt,		OPAL_HANDLE_INTERRUPT);
208OPAL_CALL(opal_poll_events,			OPAL_POLL_EVENTS);
209OPAL_CALL(opal_pci_set_hub_tce_memory,		OPAL_PCI_SET_HUB_TCE_MEMORY);
210OPAL_CALL(opal_pci_set_phb_tce_memory,		OPAL_PCI_SET_PHB_TCE_MEMORY);
211OPAL_CALL(opal_pci_config_read_byte,		OPAL_PCI_CONFIG_READ_BYTE);
212OPAL_CALL(opal_pci_config_read_half_word,	OPAL_PCI_CONFIG_READ_HALF_WORD);
213OPAL_CALL(opal_pci_config_read_word,		OPAL_PCI_CONFIG_READ_WORD);
214OPAL_CALL(opal_pci_config_write_byte,		OPAL_PCI_CONFIG_WRITE_BYTE);
215OPAL_CALL(opal_pci_config_write_half_word,	OPAL_PCI_CONFIG_WRITE_HALF_WORD);
216OPAL_CALL(opal_pci_config_write_word,		OPAL_PCI_CONFIG_WRITE_WORD);
217OPAL_CALL(opal_set_xive,			OPAL_SET_XIVE);
218OPAL_CALL(opal_get_xive,			OPAL_GET_XIVE);
219OPAL_CALL(opal_register_exception_handler,	OPAL_REGISTER_OPAL_EXCEPTION_HANDLER);
220OPAL_CALL(opal_pci_eeh_freeze_status,		OPAL_PCI_EEH_FREEZE_STATUS);
221OPAL_CALL(opal_pci_eeh_freeze_clear,		OPAL_PCI_EEH_FREEZE_CLEAR);
222OPAL_CALL(opal_pci_eeh_freeze_set,		OPAL_PCI_EEH_FREEZE_SET);
223OPAL_CALL(opal_pci_err_inject,			OPAL_PCI_ERR_INJECT);
224OPAL_CALL(opal_pci_shpc,			OPAL_PCI_SHPC);
225OPAL_CALL(opal_pci_phb_mmio_enable,		OPAL_PCI_PHB_MMIO_ENABLE);
226OPAL_CALL(opal_pci_set_phb_mem_window,		OPAL_PCI_SET_PHB_MEM_WINDOW);
227OPAL_CALL(opal_pci_map_pe_mmio_window,		OPAL_PCI_MAP_PE_MMIO_WINDOW);
228OPAL_CALL(opal_pci_set_phb_table_memory,	OPAL_PCI_SET_PHB_TABLE_MEMORY);
229OPAL_CALL(opal_pci_set_pe,			OPAL_PCI_SET_PE);
230OPAL_CALL(opal_pci_set_peltv,			OPAL_PCI_SET_PELTV);
231OPAL_CALL(opal_pci_set_mve,			OPAL_PCI_SET_MVE);
232OPAL_CALL(opal_pci_set_mve_enable,		OPAL_PCI_SET_MVE_ENABLE);
233OPAL_CALL(opal_pci_get_xive_reissue,		OPAL_PCI_GET_XIVE_REISSUE);
234OPAL_CALL(opal_pci_set_xive_reissue,		OPAL_PCI_SET_XIVE_REISSUE);
235OPAL_CALL(opal_pci_set_xive_pe,			OPAL_PCI_SET_XIVE_PE);
236OPAL_CALL(opal_get_xive_source,			OPAL_GET_XIVE_SOURCE);
237OPAL_CALL(opal_get_msi_32,			OPAL_GET_MSI_32);
238OPAL_CALL(opal_get_msi_64,			OPAL_GET_MSI_64);
239OPAL_CALL(opal_start_cpu,			OPAL_START_CPU);
240OPAL_CALL(opal_query_cpu_status,		OPAL_QUERY_CPU_STATUS);
241OPAL_CALL(opal_write_oppanel,			OPAL_WRITE_OPPANEL);
242OPAL_CALL(opal_pci_map_pe_dma_window,		OPAL_PCI_MAP_PE_DMA_WINDOW);
243OPAL_CALL(opal_pci_map_pe_dma_window_real,	OPAL_PCI_MAP_PE_DMA_WINDOW_REAL);
244OPAL_CALL(opal_pci_reset,			OPAL_PCI_RESET);
245OPAL_CALL(opal_pci_get_hub_diag_data,		OPAL_PCI_GET_HUB_DIAG_DATA);
246OPAL_CALL(opal_pci_get_phb_diag_data,		OPAL_PCI_GET_PHB_DIAG_DATA);
247OPAL_CALL(opal_pci_fence_phb,			OPAL_PCI_FENCE_PHB);
248OPAL_CALL(opal_pci_reinit,			OPAL_PCI_REINIT);
249OPAL_CALL(opal_pci_mask_pe_error,		OPAL_PCI_MASK_PE_ERROR);
250OPAL_CALL(opal_set_slot_led_status,		OPAL_SET_SLOT_LED_STATUS);
251OPAL_CALL(opal_get_epow_status,			OPAL_GET_EPOW_STATUS);
252OPAL_CALL(opal_set_system_attention_led,	OPAL_SET_SYSTEM_ATTENTION_LED);
253OPAL_CALL(opal_pci_next_error,			OPAL_PCI_NEXT_ERROR);
254OPAL_CALL(opal_pci_poll,			OPAL_PCI_POLL);
255OPAL_CALL(opal_pci_msi_eoi,			OPAL_PCI_MSI_EOI);
256OPAL_CALL(opal_pci_get_phb_diag_data2,		OPAL_PCI_GET_PHB_DIAG_DATA2);
257OPAL_CALL(opal_xscom_read,			OPAL_XSCOM_READ);
258OPAL_CALL(opal_xscom_write,			OPAL_XSCOM_WRITE);
259OPAL_CALL(opal_lpc_read,			OPAL_LPC_READ);
260OPAL_CALL(opal_lpc_write,			OPAL_LPC_WRITE);
261OPAL_CALL(opal_return_cpu,			OPAL_RETURN_CPU);
262OPAL_CALL(opal_reinit_cpus,			OPAL_REINIT_CPUS);
263OPAL_CALL(opal_read_elog,			OPAL_ELOG_READ);
264OPAL_CALL(opal_send_ack_elog,			OPAL_ELOG_ACK);
265OPAL_CALL(opal_get_elog_size,			OPAL_ELOG_SIZE);
266OPAL_CALL(opal_resend_pending_logs,		OPAL_ELOG_RESEND);
267OPAL_CALL(opal_write_elog,			OPAL_ELOG_WRITE);
268OPAL_CALL(opal_validate_flash,			OPAL_FLASH_VALIDATE);
269OPAL_CALL(opal_manage_flash,			OPAL_FLASH_MANAGE);
270OPAL_CALL(opal_update_flash,			OPAL_FLASH_UPDATE);
271OPAL_CALL(opal_resync_timebase,			OPAL_RESYNC_TIMEBASE);
272OPAL_CALL(opal_check_token,			OPAL_CHECK_TOKEN);
273OPAL_CALL(opal_dump_init,			OPAL_DUMP_INIT);
274OPAL_CALL(opal_dump_info,			OPAL_DUMP_INFO);
275OPAL_CALL(opal_dump_info2,			OPAL_DUMP_INFO2);
276OPAL_CALL(opal_dump_read,			OPAL_DUMP_READ);
277OPAL_CALL(opal_dump_ack,			OPAL_DUMP_ACK);
278OPAL_CALL(opal_get_msg,				OPAL_GET_MSG);
279OPAL_CALL(opal_check_completion,		OPAL_CHECK_ASYNC_COMPLETION);
280OPAL_CALL(opal_dump_resend_notification,	OPAL_DUMP_RESEND);
281OPAL_CALL(opal_sync_host_reboot,		OPAL_SYNC_HOST_REBOOT);
282OPAL_CALL(opal_sensor_read,			OPAL_SENSOR_READ);
283OPAL_CALL(opal_get_param,			OPAL_GET_PARAM);
284OPAL_CALL(opal_set_param,			OPAL_SET_PARAM);
285OPAL_CALL(opal_handle_hmi,			OPAL_HANDLE_HMI);
286OPAL_CALL(opal_slw_set_reg,			OPAL_SLW_SET_REG);
287OPAL_CALL(opal_register_dump_region,		OPAL_REGISTER_DUMP_REGION);
288OPAL_CALL(opal_unregister_dump_region,		OPAL_UNREGISTER_DUMP_REGION);
289OPAL_CALL(opal_pci_set_phb_cxl_mode,		OPAL_PCI_SET_PHB_CAPI_MODE);
290OPAL_CALL(opal_tpo_write,			OPAL_WRITE_TPO);
291OPAL_CALL(opal_tpo_read,			OPAL_READ_TPO);
292OPAL_CALL(opal_ipmi_send,			OPAL_IPMI_SEND);
293OPAL_CALL(opal_ipmi_recv,			OPAL_IPMI_RECV);
294OPAL_CALL(opal_i2c_request,			OPAL_I2C_REQUEST);
295OPAL_CALL(opal_flash_read,			OPAL_FLASH_READ);
296OPAL_CALL(opal_flash_write,			OPAL_FLASH_WRITE);
297OPAL_CALL(opal_flash_erase,			OPAL_FLASH_ERASE);
298