xref: /rk3399_ARM-atf/lib/cpus/aarch64/neoverse_n1.S (revision 411f4959b45b7a072b567dadf33b110936f14f32)
1/*
2 * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7#include <arch.h>
8#include <asm_macros.S>
9#include <neoverse_n1.h>
10#include <cpuamu.h>
11#include <cpu_macros.S>
12
13/* Hardware handled coherency */
14#if HW_ASSISTED_COHERENCY == 0
15#error "Neoverse N1 must be compiled with HW_ASSISTED_COHERENCY enabled"
16#endif
17
18/* 64-bit only core */
19#if CTX_INCLUDE_AARCH32_REGS == 1
20#error "Neoverse-N1 supports only AArch64. Compile with CTX_INCLUDE_AARCH32_REGS=0"
21#endif
22
23/* --------------------------------------------------
24 * Errata Workaround for Neoverse N1 Erratum 1043202.
25 * This applies to revision r0p0 and r1p0 of Neoverse N1.
26 * Inputs:
27 * x0: variant[4:7] and revision[0:3] of current cpu.
28 * Shall clobber: x0-x17
29 * --------------------------------------------------
30 */
31func errata_n1_1043202_wa
32	/* Compare x0 against revision r1p0 */
33	mov	x17, x30
34	bl	check_errata_1043202
35	cbz	x0, 1f
36
37	/* Apply instruction patching sequence */
38	ldr	x0, =0x0
39	msr	CPUPSELR_EL3, x0
40	ldr	x0, =0xF3BF8F2F
41	msr	CPUPOR_EL3, x0
42	ldr	x0, =0xFFFFFFFF
43	msr	CPUPMR_EL3, x0
44	ldr	x0, =0x800200071
45	msr	CPUPCR_EL3, x0
46	isb
471:
48	ret	x17
49endfunc errata_n1_1043202_wa
50
51func check_errata_1043202
52	/* Applies to r0p0 and r1p0 */
53	mov	x1, #0x10
54	b	cpu_rev_var_ls
55endfunc check_errata_1043202
56
57/* --------------------------------------------------
58 * Disable speculative loads if Neoverse N1 supports
59 * SSBS.
60 *
61 * Shall clobber: x0.
62 * --------------------------------------------------
63 */
64func neoverse_n1_disable_speculative_loads
65	/* Check if the PE implements SSBS */
66	mrs	x0, id_aa64pfr1_el1
67	tst	x0, #(ID_AA64PFR1_EL1_SSBS_MASK << ID_AA64PFR1_EL1_SSBS_SHIFT)
68	b.eq	1f
69
70	/* Disable speculative loads */
71	msr	SSBS, xzr
72	isb
73
741:
75	ret
76endfunc neoverse_n1_disable_speculative_loads
77
78/* --------------------------------------------------
79 * Errata Workaround for Neoverse N1 Errata #1073348
80 * This applies to revision r0p0 and r1p0 of Neoverse N1.
81 * Inputs:
82 * x0: variant[4:7] and revision[0:3] of current cpu.
83 * Shall clobber: x0-x17
84 * --------------------------------------------------
85 */
86func errata_n1_1073348_wa
87	/* Compare x0 against revision r1p0 */
88	mov	x17, x30
89	bl	check_errata_1073348
90	cbz	x0, 1f
91	mrs	x1, NEOVERSE_N1_CPUACTLR_EL1
92	orr	x1, x1, NEOVERSE_N1_CPUACTLR_EL1_BIT_6
93	msr	NEOVERSE_N1_CPUACTLR_EL1, x1
94	isb
951:
96	ret	x17
97endfunc errata_n1_1073348_wa
98
99func check_errata_1073348
100	/* Applies to r0p0 and r1p0 */
101	mov	x1, #0x10
102	b	cpu_rev_var_ls
103endfunc check_errata_1073348
104
105/* --------------------------------------------------
106 * Errata Workaround for Neoverse N1 Errata #1130799
107 * This applies to revision <=r2p0 of Neoverse N1.
108 * Inputs:
109 * x0: variant[4:7] and revision[0:3] of current cpu.
110 * Shall clobber: x0-x17
111 * --------------------------------------------------
112 */
113func errata_n1_1130799_wa
114	/* Compare x0 against revision r2p0 */
115	mov	x17, x30
116	bl	check_errata_1130799
117	cbz	x0, 1f
118	mrs	x1, NEOVERSE_N1_CPUACTLR2_EL1
119	orr	x1, x1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_59
120	msr	NEOVERSE_N1_CPUACTLR2_EL1, x1
121	isb
1221:
123	ret	x17
124endfunc errata_n1_1130799_wa
125
126func check_errata_1130799
127	/* Applies to <=r2p0 */
128	mov	x1, #0x20
129	b	cpu_rev_var_ls
130endfunc check_errata_1130799
131
132/* --------------------------------------------------
133 * Errata Workaround for Neoverse N1 Errata #1165347
134 * This applies to revision <=r2p0 of Neoverse N1.
135 * Inputs:
136 * x0: variant[4:7] and revision[0:3] of current cpu.
137 * Shall clobber: x0-x17
138 * --------------------------------------------------
139 */
140func errata_n1_1165347_wa
141	/* Compare x0 against revision r2p0 */
142	mov	x17, x30
143	bl	check_errata_1165347
144	cbz	x0, 1f
145	mrs	x1, NEOVERSE_N1_CPUACTLR2_EL1
146	orr	x1, x1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_0
147	orr	x1, x1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_15
148	msr	NEOVERSE_N1_CPUACTLR2_EL1, x1
149	isb
1501:
151	ret	x17
152endfunc errata_n1_1165347_wa
153
154func check_errata_1165347
155	/* Applies to <=r2p0 */
156	mov	x1, #0x20
157	b	cpu_rev_var_ls
158endfunc check_errata_1165347
159
160/* --------------------------------------------------
161 * Errata Workaround for Neoverse N1 Errata #1207823
162 * This applies to revision <=r2p0 of Neoverse N1.
163 * Inputs:
164 * x0: variant[4:7] and revision[0:3] of current cpu.
165 * Shall clobber: x0-x17
166 * --------------------------------------------------
167 */
168func errata_n1_1207823_wa
169	/* Compare x0 against revision r2p0 */
170	mov	x17, x30
171	bl	check_errata_1207823
172	cbz	x0, 1f
173	mrs	x1, NEOVERSE_N1_CPUACTLR2_EL1
174	orr	x1, x1, NEOVERSE_N1_CPUACTLR2_EL1_BIT_11
175	msr	NEOVERSE_N1_CPUACTLR2_EL1, x1
176	isb
1771:
178	ret	x17
179endfunc errata_n1_1207823_wa
180
181func check_errata_1207823
182	/* Applies to <=r2p0 */
183	mov	x1, #0x20
184	b	cpu_rev_var_ls
185endfunc check_errata_1207823
186
187/* --------------------------------------------------
188 * Errata Workaround for Neoverse N1 Errata #1220197
189 * This applies to revision <=r2p0 of Neoverse N1.
190 * Inputs:
191 * x0: variant[4:7] and revision[0:3] of current cpu.
192 * Shall clobber: x0-x17
193 * --------------------------------------------------
194 */
195func errata_n1_1220197_wa
196	/* Compare x0 against revision r2p0 */
197	mov	x17, x30
198	bl	check_errata_1220197
199	cbz	x0, 1f
200	mrs	x1, NEOVERSE_N1_CPUECTLR_EL1
201	orr	x1, x1, NEOVERSE_N1_WS_THR_L2_MASK
202	msr	NEOVERSE_N1_CPUECTLR_EL1, x1
203	isb
2041:
205	ret	x17
206endfunc errata_n1_1220197_wa
207
208func check_errata_1220197
209	/* Applies to <=r2p0 */
210	mov	x1, #0x20
211	b	cpu_rev_var_ls
212endfunc check_errata_1220197
213
214/* --------------------------------------------------
215 * Errata Workaround for Neoverse N1 Errata #1257314
216 * This applies to revision <=r3p0 of Neoverse N1.
217 * Inputs:
218 * x0: variant[4:7] and revision[0:3] of current cpu.
219 * Shall clobber: x0-x17
220 * --------------------------------------------------
221 */
222func errata_n1_1257314_wa
223	/* Compare x0 against revision r3p0 */
224	mov	x17, x30
225	bl	check_errata_1257314
226	cbz	x0, 1f
227	mrs	x1, NEOVERSE_N1_CPUACTLR3_EL1
228	orr	x1, x1, NEOVERSE_N1_CPUACTLR3_EL1_BIT_10
229	msr	NEOVERSE_N1_CPUACTLR3_EL1, x1
230	isb
2311:
232	ret	x17
233endfunc errata_n1_1257314_wa
234
235func check_errata_1257314
236	/* Applies to <=r3p0 */
237	mov	x1, #0x30
238	b	cpu_rev_var_ls
239endfunc check_errata_1257314
240
241/* --------------------------------------------------
242 * Errata Workaround for Neoverse N1 Errata #1262606
243 * This applies to revision <=r3p0 of Neoverse N1.
244 * Inputs:
245 * x0: variant[4:7] and revision[0:3] of current cpu.
246 * Shall clobber: x0-x17
247 * --------------------------------------------------
248 */
249func errata_n1_1262606_wa
250	/* Compare x0 against revision r3p0 */
251	mov	x17, x30
252	bl	check_errata_1262606
253	cbz	x0, 1f
254	mrs	x1, NEOVERSE_N1_CPUACTLR_EL1
255	orr	x1, x1, NEOVERSE_N1_CPUACTLR_EL1_BIT_13
256	msr	NEOVERSE_N1_CPUACTLR_EL1, x1
257	isb
2581:
259	ret	x17
260endfunc errata_n1_1262606_wa
261
262func check_errata_1262606
263	/* Applies to <=r3p0 */
264	mov	x1, #0x30
265	b	cpu_rev_var_ls
266endfunc check_errata_1262606
267
268/* --------------------------------------------------
269 * Errata Workaround for Neoverse N1 Erratum 1315703.
270 * This applies to revision <= r3p0 of Neoverse N1.
271 * Inputs:
272 * x0: variant[4:7] and revision[0:3] of current cpu.
273 * Shall clobber: x0-x17
274 * --------------------------------------------------
275 */
276func errata_n1_1315703_wa
277	/* Compare x0 against revision r3p1 */
278	mov	x17, x30
279	bl	check_errata_1315703
280	cbz	x0, 1f
281
282	mrs	x0, NEOVERSE_N1_CPUACTLR2_EL1
283	orr	x0, x0, #NEOVERSE_N1_CPUACTLR2_EL1_BIT_16
284	msr	NEOVERSE_N1_CPUACTLR2_EL1, x0
285	isb
286
2871:
288	ret	x17
289endfunc errata_n1_1315703_wa
290
291func check_errata_1315703
292	/* Applies to everything <= r3p0. */
293	mov	x1, #0x30
294	b	cpu_rev_var_ls
295endfunc check_errata_1315703
296
297func neoverse_n1_reset_func
298	mov	x19, x30
299
300	bl neoverse_n1_disable_speculative_loads
301
302	/* Forces all cacheable atomic instructions to be near */
303	mrs	x0, NEOVERSE_N1_CPUACTLR2_EL1
304	orr	x0, x0, #NEOVERSE_N1_CPUACTLR2_EL1_BIT_2
305	msr	NEOVERSE_N1_CPUACTLR2_EL1, x0
306	isb
307
308	bl	cpu_get_rev_var
309	mov	x18, x0
310
311#if ERRATA_N1_1043202
312	mov	x0, x18
313	bl	errata_n1_1043202_wa
314#endif
315
316#if ERRATA_N1_1073348
317	mov	x0, x18
318	bl	errata_n1_1073348_wa
319#endif
320
321#if ERRATA_N1_1130799
322	mov	x0, x18
323	bl	errata_n1_1130799_wa
324#endif
325
326#if ERRATA_N1_1165347
327	mov	x0, x18
328	bl	errata_n1_1165347_wa
329#endif
330
331#if ERRATA_N1_1207823
332	mov	x0, x18
333	bl	errata_n1_1207823_wa
334#endif
335
336#if ERRATA_N1_1220197
337	mov	x0, x18
338	bl	errata_n1_1220197_wa
339#endif
340
341#if ERRATA_N1_1257314
342	mov	x0, x18
343	bl	errata_n1_1257314_wa
344#endif
345
346#if ERRATA_N1_1262606
347	mov	x0, x18
348	bl	errata_n1_1262606_wa
349#endif
350
351#if ERRATA_N1_1315703
352	mov	x0, x18
353	bl	errata_n1_1315703_wa
354#endif
355
356#if ENABLE_AMU
357	/* Make sure accesses from EL0/EL1 and EL2 are not trapped to EL3 */
358	mrs	x0, actlr_el3
359	orr	x0, x0, #NEOVERSE_N1_ACTLR_AMEN_BIT
360	msr	actlr_el3, x0
361	isb
362
363	/* Make sure accesses from EL0/EL1 are not trapped to EL2 */
364	mrs	x0, actlr_el2
365	orr	x0, x0, #NEOVERSE_N1_ACTLR_AMEN_BIT
366	msr	actlr_el2, x0
367	isb
368
369	/* Enable group0 counters */
370	mov	x0, #NEOVERSE_N1_AMU_GROUP0_MASK
371	msr	CPUAMCNTENSET_EL0, x0
372	isb
373#endif
374
375#if ERRATA_DSU_936184
376	bl	errata_dsu_936184_wa
377#endif
378
379	ret	x19
380endfunc neoverse_n1_reset_func
381
382	/* ---------------------------------------------
383	 * HW will do the cache maintenance while powering down
384	 * ---------------------------------------------
385	 */
386func neoverse_n1_core_pwr_dwn
387	/* ---------------------------------------------
388	 * Enable CPU power down bit in power control register
389	 * ---------------------------------------------
390	 */
391	mrs	x0, NEOVERSE_N1_CPUPWRCTLR_EL1
392	orr	x0, x0, #NEOVERSE_N1_CORE_PWRDN_EN_MASK
393	msr	NEOVERSE_N1_CPUPWRCTLR_EL1, x0
394	isb
395	ret
396endfunc neoverse_n1_core_pwr_dwn
397
398#if REPORT_ERRATA
399/*
400 * Errata printing function for Neoverse N1. Must follow AAPCS.
401 */
402func neoverse_n1_errata_report
403	stp	x8, x30, [sp, #-16]!
404
405	bl	cpu_get_rev_var
406	mov	x8, x0
407
408	/*
409	 * Report all errata. The revision-variant information is passed to
410	 * checking functions of each errata.
411	 */
412	report_errata ERRATA_N1_1043202, neoverse_n1, 1043202
413	report_errata ERRATA_N1_1073348, neoverse_n1, 1073348
414	report_errata ERRATA_N1_1130799, neoverse_n1, 1130799
415	report_errata ERRATA_N1_1165347, neoverse_n1, 1165347
416	report_errata ERRATA_N1_1207823, neoverse_n1, 1207823
417	report_errata ERRATA_N1_1220197, neoverse_n1, 1220197
418	report_errata ERRATA_N1_1257314, neoverse_n1, 1257314
419	report_errata ERRATA_N1_1262606, neoverse_n1, 1262606
420	report_errata ERRATA_N1_1315703, neoverse_n1, 1315703
421	report_errata ERRATA_DSU_936184, neoverse_n1, dsu_936184
422
423	ldp	x8, x30, [sp], #16
424	ret
425endfunc neoverse_n1_errata_report
426#endif
427
428	/* ---------------------------------------------
429	 * This function provides neoverse_n1 specific
430	 * register information for crash reporting.
431	 * It needs to return with x6 pointing to
432	 * a list of register names in ascii and
433	 * x8 - x15 having values of registers to be
434	 * reported.
435	 * ---------------------------------------------
436	 */
437.section .rodata.neoverse_n1_regs, "aS"
438neoverse_n1_regs:  /* The ascii list of register names to be reported */
439	.asciz	"cpuectlr_el1", ""
440
441func neoverse_n1_cpu_reg_dump
442	adr	x6, neoverse_n1_regs
443	mrs	x8, NEOVERSE_N1_CPUECTLR_EL1
444	ret
445endfunc neoverse_n1_cpu_reg_dump
446
447declare_cpu_ops neoverse_n1, NEOVERSE_N1_MIDR, \
448	neoverse_n1_reset_func, \
449	neoverse_n1_core_pwr_dwn
450