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Soby Mathew5e5c2072014-04-07 15:28:55 +01001/*
2 * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * Redistributions of source code must retain the above copyright notice, this
8 * list of conditions and the following disclaimer.
9 *
10 * Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 *
14 * Neither the name of ARM nor the names of its contributors may be used
15 * to endorse or promote products derived from this software without specific
16 * prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30#include <arch.h>
31#include <asm_macros.S>
32#include <context.h>
Andrew Thoelke8c28fe02014-06-02 11:40:35 +010033#include <cpu_data.h>
Soby Mathew5e5c2072014-04-07 15:28:55 +010034#include <plat_macros.S>
Sandrine Bailleuxaf1ef2b2014-05-27 15:46:07 +010035#include <platform_def.h>
Soby Mathew5e5c2072014-04-07 15:28:55 +010036
Soby Mathewc1adbbc2014-06-25 10:07:40 +010037 .globl report_unhandled_exception
38 .globl report_unhandled_interrupt
39 .globl el3_panic
Soby Mathew5e5c2072014-04-07 15:28:55 +010040
Andrew Thoelke385f4d42014-06-03 11:50:53 +010041#if CRASH_REPORTING
Soby Mathewc1adbbc2014-06-25 10:07:40 +010042#define REG_SIZE 0x8
43
Soby Mathew5e5c2072014-04-07 15:28:55 +010044 /* ------------------------------------------------------
45 * The below section deals with dumping the system state
46 * when an unhandled exception is taken in EL3.
47 * The layout and the names of the registers which will
48 * be dumped during a unhandled exception is given below.
49 * ------------------------------------------------------
50 */
Soby Mathewc1adbbc2014-06-25 10:07:40 +010051.section .rodata.crash_prints, "aS"
52print_spacer:
53 .asciz " =\t\t0x"
Soby Mathew5e5c2072014-04-07 15:28:55 +010054
Soby Mathewc1adbbc2014-06-25 10:07:40 +010055gp_regs:
56 .asciz "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",\
57 "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15",\
58 "x16", "x17", "x18", "x19", "x20", "x21", "x22",\
59 "x23", "x24", "x25", "x26", "x27", "x28", "x29", ""
60el3_sys_regs:
61 .asciz "scr_el3", "sctlr_el3", "cptr_el3", "tcr_el3",\
62 "daif", "mair_el3", "spsr_el3", "elr_el3", "ttbr0_el3",\
63 "esr_el3", "far_el3", ""
Soby Mathew5e5c2072014-04-07 15:28:55 +010064
Soby Mathewc1adbbc2014-06-25 10:07:40 +010065non_el3_sys_regs:
66 .asciz "spsr_el1", "elr_el1", "spsr_abt", "spsr_und",\
67 "spsr_irq", "spsr_fiq", "sctlr_el1", "actlr_el1", "cpacr_el1",\
68 "csselr_el1", "sp_el1", "esr_el1", "ttbr0_el1", "ttbr1_el1",\
69 "mair_el1", "amair_el1", "tcr_el1", "tpidr_el1", "tpidr_el0",\
70 "tpidrro_el0", "dacr32_el2", "ifsr32_el2", "par_el1",\
71 "mpidr_el1", "afsr0_el1", "afsr1_el1", "contextidr_el1",\
72 "vbar_el1", "cntp_ctl_el0", "cntp_cval_el0", "cntv_ctl_el0",\
73 "cntv_cval_el0", "cntkctl_el1", "fpexc32_el2", "sp_el0", ""
Soby Mathew5e5c2072014-04-07 15:28:55 +010074
Soby Mathewc1adbbc2014-06-25 10:07:40 +010075panic_msg:
76 .asciz "PANIC in EL3 at x30 = 0x"
77excpt_msg:
78 .asciz "Unhandled Exception in EL3.\nx30 =\t\t0x"
79intr_excpt_msg:
80 .asciz "Unhandled Interrupt Exception in EL3.\nx30 =\t\t0x"
Soby Mathew5e5c2072014-04-07 15:28:55 +010081
Soby Mathewc1adbbc2014-06-25 10:07:40 +010082 /*
83 * Helper function to print newline to console.
Soby Mathew5e5c2072014-04-07 15:28:55 +010084 */
Soby Mathewc1adbbc2014-06-25 10:07:40 +010085func print_newline
86 mov x0, '\n'
87 b plat_crash_console_putc
Kévin Petita877c252015-03-24 14:03:57 +000088endfunc print_newline
Soby Mathew5e5c2072014-04-07 15:28:55 +010089
Soby Mathewc1adbbc2014-06-25 10:07:40 +010090 /*
91 * Helper function to print from crash buf.
92 * The print loop is controlled by the buf size and
93 * ascii reg name list which is passed in x6. The
94 * function returns the crash buf address in x0.
95 * Clobbers : x0 - x7, sp
96 */
97func size_controlled_print
98 /* Save the lr */
99 mov sp, x30
100 /* load the crash buf address */
101 mrs x7, tpidr_el3
102test_size_list:
103 /* Calculate x5 always as it will be clobbered by asm_print_hex */
104 mrs x5, tpidr_el3
105 add x5, x5, #CPU_DATA_CRASH_BUF_SIZE
106 /* Test whether we have reached end of crash buf */
107 cmp x7, x5
108 b.eq exit_size_print
109 ldrb w4, [x6]
110 /* Test whether we are at end of list */
111 cbz w4, exit_size_print
112 mov x4, x6
113 /* asm_print_str updates x4 to point to next entry in list */
114 bl asm_print_str
115 /* update x6 with the updated list pointer */
116 mov x6, x4
117 adr x4, print_spacer
118 bl asm_print_str
119 ldr x4, [x7], #REG_SIZE
120 bl asm_print_hex
121 bl print_newline
122 b test_size_list
123exit_size_print:
124 mov x30, sp
125 ret
Kévin Petita877c252015-03-24 14:03:57 +0000126endfunc size_controlled_print
Soby Mathew5e5c2072014-04-07 15:28:55 +0100127
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100128 /*
129 * Helper function to store x8 - x15 registers to
130 * the crash buf. The system registers values are
131 * copied to x8 to x15 by the caller which are then
132 * copied to the crash buf by this function.
133 * x0 points to the crash buf. It then calls
134 * size_controlled_print to print to console.
135 * Clobbers : x0 - x7, sp
136 */
137func str_in_crash_buf_print
138 /* restore the crash buf address in x0 */
139 mrs x0, tpidr_el3
140 stp x8, x9, [x0]
141 stp x10, x11, [x0, #REG_SIZE * 2]
142 stp x12, x13, [x0, #REG_SIZE * 4]
143 stp x14, x15, [x0, #REG_SIZE * 6]
144 b size_controlled_print
Kévin Petita877c252015-03-24 14:03:57 +0000145endfunc str_in_crash_buf_print
Soby Mathew5e5c2072014-04-07 15:28:55 +0100146
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100147 /* ------------------------------------------------------
148 * This macro calculates the offset to crash buf from
149 * cpu_data and stores it in tpidr_el3. It also saves x0
150 * and x1 in the crash buf by using sp as a temporary
151 * register.
152 * ------------------------------------------------------
153 */
154 .macro prepare_crash_buf_save_x0_x1
155 /* we can corrupt this reg to free up x0 */
156 mov sp, x0
157 /* tpidr_el3 contains the address to cpu_data structure */
158 mrs x0, tpidr_el3
159 /* Calculate the Crash buffer offset in cpu_data */
160 add x0, x0, #CPU_DATA_CRASH_BUF_OFFSET
161 /* Store crash buffer address in tpidr_el3 */
162 msr tpidr_el3, x0
163 str x1, [x0, #REG_SIZE]
Soby Mathew5e5c2072014-04-07 15:28:55 +0100164 mov x1, sp
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100165 str x1, [x0]
Soby Mathew5e5c2072014-04-07 15:28:55 +0100166 .endm
167
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100168 /* -----------------------------------------------------
169 * This function allows to report a crash (if crash
170 * reporting is enabled) when an unhandled exception
171 * occurs. It prints the CPU state via the crash console
172 * making use of the crash buf. This function will
173 * not return.
174 * -----------------------------------------------------
175 */
176func report_unhandled_exception
177 prepare_crash_buf_save_x0_x1
178 adr x0, excpt_msg
179 mov sp, x0
180 /* This call will not return */
181 b do_crash_reporting
Kévin Petita877c252015-03-24 14:03:57 +0000182endfunc report_unhandled_exception
Soby Mathew5e5c2072014-04-07 15:28:55 +0100183
Soby Mathew5e5c2072014-04-07 15:28:55 +0100184
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100185 /* -----------------------------------------------------
186 * This function allows to report a crash (if crash
187 * reporting is enabled) when an unhandled interrupt
188 * occurs. It prints the CPU state via the crash console
189 * making use of the crash buf. This function will
190 * not return.
191 * -----------------------------------------------------
192 */
193func report_unhandled_interrupt
194 prepare_crash_buf_save_x0_x1
195 adr x0, intr_excpt_msg
196 mov sp, x0
197 /* This call will not return */
198 b do_crash_reporting
Kévin Petita877c252015-03-24 14:03:57 +0000199endfunc report_unhandled_interrupt
Soby Mathew5e5c2072014-04-07 15:28:55 +0100200
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100201 /* -----------------------------------------------------
202 * This function allows to report a crash (if crash
203 * reporting is enabled) when panic() is invoked from
204 * C Runtime. It prints the CPU state via the crash
205 * console making use of the crash buf. This function
206 * will not return.
207 * -----------------------------------------------------
208 */
209func el3_panic
210 msr spsel, #1
211 prepare_crash_buf_save_x0_x1
212 adr x0, panic_msg
213 mov sp, x0
214 /* This call will not return */
215 b do_crash_reporting
Kévin Petita877c252015-03-24 14:03:57 +0000216endfunc el3_panic
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100217
218 /* ------------------------------------------------------------
219 * The common crash reporting functionality. It requires x0
220 * and x1 has already been stored in crash buf, sp points to
221 * crash message and tpidr_el3 contains the crash buf address.
222 * The function does the following:
223 * - Retrieve the crash buffer from tpidr_el3
224 * - Store x2 to x6 in the crash buffer
225 * - Initialise the crash console.
226 * - Print the crash message by using the address in sp.
227 * - Print x30 value to the crash console.
228 * - Print x0 - x7 from the crash buf to the crash console.
229 * - Print x8 - x29 (in groups of 8 registers) using the
230 * crash buf to the crash console.
231 * - Print el3 sys regs (in groups of 8 registers) using the
232 * crash buf to the crash console.
233 * - Print non el3 sys regs (in groups of 8 registers) using
234 * the crash buf to the crash console.
235 * ------------------------------------------------------------
236 */
237func do_crash_reporting
238 /* Retrieve the crash buf from tpidr_el3 */
239 mrs x0, tpidr_el3
240 /* Store x2 - x6, x30 in the crash buffer */
241 stp x2, x3, [x0, #REG_SIZE * 2]
242 stp x4, x5, [x0, #REG_SIZE * 4]
243 stp x6, x30, [x0, #REG_SIZE * 6]
244 /* Initialize the crash console */
245 bl plat_crash_console_init
246 /* Verify the console is initialized */
247 cbz x0, crash_panic
248 /* Print the crash message. sp points to the crash message */
249 mov x4, sp
250 bl asm_print_str
251 /* load the crash buf address */
252 mrs x0, tpidr_el3
253 /* report x30 first from the crash buf */
254 ldr x4, [x0, #REG_SIZE * 7]
255 bl asm_print_hex
256 bl print_newline
257 /* Load the crash buf address */
258 mrs x0, tpidr_el3
259 /* Now mov x7 into crash buf */
260 str x7, [x0, #REG_SIZE * 7]
Soby Mathew5e5c2072014-04-07 15:28:55 +0100261
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100262 /* Report x0 - x29 values stored in crash buf*/
263 /* Store the ascii list pointer in x6 */
264 adr x6, gp_regs
265 /* Print x0 to x7 from the crash buf */
266 bl size_controlled_print
267 /* Store x8 - x15 in crash buf and print */
268 bl str_in_crash_buf_print
269 /* Load the crash buf address */
270 mrs x0, tpidr_el3
271 /* Store the rest of gp regs and print */
272 stp x16, x17, [x0]
273 stp x18, x19, [x0, #REG_SIZE * 2]
274 stp x20, x21, [x0, #REG_SIZE * 4]
275 stp x22, x23, [x0, #REG_SIZE * 6]
276 bl size_controlled_print
277 /* Load the crash buf address */
278 mrs x0, tpidr_el3
279 stp x24, x25, [x0]
280 stp x26, x27, [x0, #REG_SIZE * 2]
281 stp x28, x29, [x0, #REG_SIZE * 4]
282 bl size_controlled_print
Soby Mathew5e5c2072014-04-07 15:28:55 +0100283
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100284 /* Print the el3 sys registers */
285 adr x6, el3_sys_regs
286 mrs x8, scr_el3
287 mrs x9, sctlr_el3
288 mrs x10, cptr_el3
289 mrs x11, tcr_el3
290 mrs x12, daif
291 mrs x13, mair_el3
292 mrs x14, spsr_el3
293 mrs x15, elr_el3
294 bl str_in_crash_buf_print
295 mrs x8, ttbr0_el3
296 mrs x9, esr_el3
297 mrs x10, far_el3
298 bl str_in_crash_buf_print
Soby Mathew5e5c2072014-04-07 15:28:55 +0100299
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100300 /* Print the non el3 sys registers */
301 adr x6, non_el3_sys_regs
302 mrs x8, spsr_el1
303 mrs x9, elr_el1
304 mrs x10, spsr_abt
305 mrs x11, spsr_und
306 mrs x12, spsr_irq
307 mrs x13, spsr_fiq
308 mrs x14, sctlr_el1
309 mrs x15, actlr_el1
310 bl str_in_crash_buf_print
311 mrs x8, cpacr_el1
312 mrs x9, csselr_el1
Soby Mathew5e5c2072014-04-07 15:28:55 +0100313 mrs x10, sp_el1
314 mrs x11, esr_el1
315 mrs x12, ttbr0_el1
316 mrs x13, ttbr1_el1
317 mrs x14, mair_el1
318 mrs x15, amair_el1
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100319 bl str_in_crash_buf_print
320 mrs x8, tcr_el1
321 mrs x9, tpidr_el1
322 mrs x10, tpidr_el0
323 mrs x11, tpidrro_el0
324 mrs x12, dacr32_el2
325 mrs x13, ifsr32_el2
326 mrs x14, par_el1
327 mrs x15, mpidr_el1
328 bl str_in_crash_buf_print
329 mrs x8, afsr0_el1
330 mrs x9, afsr1_el1
331 mrs x10, contextidr_el1
332 mrs x11, vbar_el1
333 mrs x12, cntp_ctl_el0
334 mrs x13, cntp_cval_el0
335 mrs x14, cntv_ctl_el0
336 mrs x15, cntv_cval_el0
337 bl str_in_crash_buf_print
338 mrs x8, cntkctl_el1
339 mrs x9, fpexc32_el2
340 mrs x10, sp_el0
341 bl str_in_crash_buf_print
Soby Mathew5e5c2072014-04-07 15:28:55 +0100342
Soby Mathew38b4bc92014-08-14 13:36:41 +0100343 /* Get the cpu specific registers to report */
344 bl do_cpu_reg_dump
345 bl str_in_crash_buf_print
Soby Mathew0da95932014-07-16 09:23:52 +0100346
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100347 /* Print the gic registers */
348 plat_print_gic_regs
Soby Mathew5e5c2072014-04-07 15:28:55 +0100349
Soby Mathew0da95932014-07-16 09:23:52 +0100350 /* Print the interconnect registers */
351 plat_print_interconnect_regs
352
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100353 /* Done reporting */
354 b crash_panic
Kévin Petita877c252015-03-24 14:03:57 +0000355endfunc do_crash_reporting
Soby Mathew5e5c2072014-04-07 15:28:55 +0100356
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100357#else /* CRASH_REPORTING */
358func report_unhandled_exception
359report_unhandled_interrupt:
360 b crash_panic
Kévin Petita877c252015-03-24 14:03:57 +0000361endfunc report_unhandled_exception
Andrew Thoelke385f4d42014-06-03 11:50:53 +0100362#endif /* CRASH_REPORING */
Soby Mathew5e5c2072014-04-07 15:28:55 +0100363
Soby Mathew5e5c2072014-04-07 15:28:55 +0100364
Soby Mathewc1adbbc2014-06-25 10:07:40 +0100365func crash_panic
366 b crash_panic
Kévin Petita877c252015-03-24 14:03:57 +0000367endfunc crash_panic