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8
9#include <stdarg.h>
10
11#include <linux/module.h>
12#include <linux/sched.h>
13#include <linux/sched/debug.h>
14#include <linux/sched/task.h>
15#include <linux/sched/task_stack.h>
16#include <linux/kernel.h>
17#include <linux/mm.h>
18#include <linux/stddef.h>
19#include <linux/unistd.h>
20#include <linux/delay.h>
21#include <linux/reboot.h>
22#include <linux/interrupt.h>
23#include <linux/init.h>
24#include <linux/cpu.h>
25#include <linux/elfcore.h>
26#include <linux/pm.h>
27#include <linux/tick.h>
28#include <linux/utsname.h>
29#include <linux/uaccess.h>
30#include <linux/random.h>
31#include <linux/gpio.h>
32#include <linux/stacktrace.h>
33
34#include <asm/cacheflush.h>
35#include <asm/processor.h>
36#include <asm/stacktrace.h>
37
38#include "setup.h"
39
40static const char * const processor_modes[] = {
41 "UK00", "UK01", "UK02", "UK03", "UK04", "UK05", "UK06", "UK07",
42 "UK08", "UK09", "UK0A", "UK0B", "UK0C", "UK0D", "UK0E", "UK0F",
43 "USER", "REAL", "INTR", "PRIV", "UK14", "UK15", "UK16", "ABRT",
44 "UK18", "UK19", "UK1A", "EXTN", "UK1C", "UK1D", "UK1E", "SUSR"
45};
46
47void arch_cpu_idle(void)
48{
49 cpu_do_idle();
50 local_irq_enable();
51}
52
53void machine_halt(void)
54{
55 gpio_set_value(GPO_SOFT_OFF, 0);
56}
57
58
59
60
61void (*pm_power_off)(void) = NULL;
62EXPORT_SYMBOL(pm_power_off);
63
64void machine_power_off(void)
65{
66 if (pm_power_off)
67 pm_power_off();
68 machine_halt();
69}
70
71void machine_restart(char *cmd)
72{
73
74 local_irq_disable();
75
76
77
78
79
80
81 setup_mm_for_reboot();
82
83
84 flush_cache_all();
85
86
87 cpu_proc_fin();
88
89
90 flush_cache_all();
91
92
93
94
95 if (reboot_mode == REBOOT_SOFT) {
96
97 cpu_reset(VECTORS_BASE);
98 } else {
99 writel(0x00002001, PM_PLLSYSCFG);
100 writel(0x00100800, PM_PLLDDRCFG);
101 writel(0x00002001, PM_PLLVGACFG);
102
103
104
105 __asm__ __volatile__(
106 " .align 5\n\t"
107 " stw %1, [%0]\n\t"
108 "201: ldw r0, [%0]\n\t"
109 " cmpsub.a r0, #0\n\t"
110 " bne 201b\n\t"
111 " stw %3, [%2]\n\t"
112 " nop; nop; nop\n\t"
113
114 :
115 : "r" (PM_PMCR),
116 "r" (PM_PMCR_CFBSYS | PM_PMCR_CFBDDR
117 | PM_PMCR_CFBVGA),
118 "r" (RESETC_SWRR),
119 "r" (RESETC_SWRR_SRB)
120 : "r0", "memory");
121 }
122
123
124
125
126
127 mdelay(1000);
128 printk(KERN_EMERG "Reboot failed -- System halted\n");
129 do { } while (1);
130}
131
132void __show_regs(struct pt_regs *regs)
133{
134 unsigned long flags;
135 char buf[64];
136
137 show_regs_print_info(KERN_DEFAULT);
138 printk("PC is at %pS\n", (void *)instruction_pointer(regs));
139 printk("LR is at %pS\n", (void *)regs->UCreg_lr);
140 printk(KERN_DEFAULT "pc : [<%08lx>] lr : [<%08lx>] psr: %08lx\n"
141 "sp : %08lx ip : %08lx fp : %08lx\n",
142 regs->UCreg_pc, regs->UCreg_lr, regs->UCreg_asr,
143 regs->UCreg_sp, regs->UCreg_ip, regs->UCreg_fp);
144 printk(KERN_DEFAULT "r26: %08lx r25: %08lx r24: %08lx\n",
145 regs->UCreg_26, regs->UCreg_25,
146 regs->UCreg_24);
147 printk(KERN_DEFAULT "r23: %08lx r22: %08lx r21: %08lx r20: %08lx\n",
148 regs->UCreg_23, regs->UCreg_22,
149 regs->UCreg_21, regs->UCreg_20);
150 printk(KERN_DEFAULT "r19: %08lx r18: %08lx r17: %08lx r16: %08lx\n",
151 regs->UCreg_19, regs->UCreg_18,
152 regs->UCreg_17, regs->UCreg_16);
153 printk(KERN_DEFAULT "r15: %08lx r14: %08lx r13: %08lx r12: %08lx\n",
154 regs->UCreg_15, regs->UCreg_14,
155 regs->UCreg_13, regs->UCreg_12);
156 printk(KERN_DEFAULT "r11: %08lx r10: %08lx r9 : %08lx r8 : %08lx\n",
157 regs->UCreg_11, regs->UCreg_10,
158 regs->UCreg_09, regs->UCreg_08);
159 printk(KERN_DEFAULT "r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
160 regs->UCreg_07, regs->UCreg_06,
161 regs->UCreg_05, regs->UCreg_04);
162 printk(KERN_DEFAULT "r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
163 regs->UCreg_03, regs->UCreg_02,
164 regs->UCreg_01, regs->UCreg_00);
165
166 flags = regs->UCreg_asr;
167 buf[0] = flags & PSR_S_BIT ? 'S' : 's';
168 buf[1] = flags & PSR_Z_BIT ? 'Z' : 'z';
169 buf[2] = flags & PSR_C_BIT ? 'C' : 'c';
170 buf[3] = flags & PSR_V_BIT ? 'V' : 'v';
171 buf[4] = '\0';
172
173 printk(KERN_DEFAULT "Flags: %s INTR o%s REAL o%s Mode %s Segment %s\n",
174 buf, interrupts_enabled(regs) ? "n" : "ff",
175 fast_interrupts_enabled(regs) ? "n" : "ff",
176 processor_modes[processor_mode(regs)],
177 uaccess_kernel() ? "kernel" : "user");
178 {
179 unsigned int ctrl;
180
181 buf[0] = '\0';
182 {
183 unsigned int transbase;
184 asm("movc %0, p0.c2, #0\n"
185 : "=r" (transbase));
186 snprintf(buf, sizeof(buf), " Table: %08x", transbase);
187 }
188 asm("movc %0, p0.c1, #0\n" : "=r" (ctrl));
189
190 printk(KERN_DEFAULT "Control: %08x%s\n", ctrl, buf);
191 }
192}
193
194void show_regs(struct pt_regs *regs)
195{
196 printk(KERN_DEFAULT "\n");
197 printk(KERN_DEFAULT "Pid: %d, comm: %20s\n",
198 task_pid_nr(current), current->comm);
199 __show_regs(regs);
200 __backtrace();
201}
202
203void flush_thread(void)
204{
205 struct thread_info *thread = current_thread_info();
206 struct task_struct *tsk = current;
207
208 memset(thread->used_cp, 0, sizeof(thread->used_cp));
209 memset(&tsk->thread.debug, 0, sizeof(struct debug_info));
210#ifdef CONFIG_UNICORE_FPU_F64
211 memset(&thread->fpstate, 0, sizeof(struct fp_state));
212#endif
213}
214
215void release_thread(struct task_struct *dead_task)
216{
217}
218
219asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
220asmlinkage void ret_from_kernel_thread(void) __asm__("ret_from_kernel_thread");
221
222int
223copy_thread(unsigned long clone_flags, unsigned long stack_start,
224 unsigned long stk_sz, struct task_struct *p)
225{
226 struct thread_info *thread = task_thread_info(p);
227 struct pt_regs *childregs = task_pt_regs(p);
228
229 memset(&thread->cpu_context, 0, sizeof(struct cpu_context_save));
230 thread->cpu_context.sp = (unsigned long)childregs;
231 if (unlikely(p->flags & PF_KTHREAD)) {
232 thread->cpu_context.pc = (unsigned long)ret_from_kernel_thread;
233 thread->cpu_context.r4 = stack_start;
234 thread->cpu_context.r5 = stk_sz;
235 memset(childregs, 0, sizeof(struct pt_regs));
236 } else {
237 thread->cpu_context.pc = (unsigned long)ret_from_fork;
238 *childregs = *current_pt_regs();
239 childregs->UCreg_00 = 0;
240 if (stack_start)
241 childregs->UCreg_sp = stack_start;
242
243 if (clone_flags & CLONE_SETTLS)
244 childregs->UCreg_16 = childregs->UCreg_03;
245 }
246 return 0;
247}
248
249
250
251
252int dump_task_regs(struct task_struct *t, elf_gregset_t *elfregs)
253{
254 elf_core_copy_regs(elfregs, task_pt_regs(t));
255 return 1;
256}
257
258
259
260
261int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fp)
262{
263 struct thread_info *thread = current_thread_info();
264 int used_math = thread->used_cp[1] | thread->used_cp[2];
265
266#ifdef CONFIG_UNICORE_FPU_F64
267 if (used_math)
268 memcpy(fp, &thread->fpstate, sizeof(*fp));
269#endif
270 return used_math != 0;
271}
272EXPORT_SYMBOL(dump_fpu);
273
274unsigned long get_wchan(struct task_struct *p)
275{
276 struct stackframe frame;
277 int count = 0;
278 if (!p || p == current || p->state == TASK_RUNNING)
279 return 0;
280
281 frame.fp = thread_saved_fp(p);
282 frame.sp = thread_saved_sp(p);
283 frame.lr = 0;
284 frame.pc = thread_saved_pc(p);
285 do {
286 int ret = unwind_frame(&frame);
287 if (ret < 0)
288 return 0;
289 if (!in_sched_functions(frame.pc))
290 return frame.pc;
291 } while ((count++) < 16);
292 return 0;
293}
294
295unsigned long arch_randomize_brk(struct mm_struct *mm)
296{
297 return randomize_page(mm->brk, 0x02000000);
298}
299
300
301
302
303
304
305
306int vectors_user_mapping(void)
307{
308 struct mm_struct *mm = current->mm;
309 return install_special_mapping(mm, 0xffff0000, PAGE_SIZE,
310 VM_READ | VM_EXEC |
311 VM_MAYREAD | VM_MAYEXEC |
312 VM_DONTEXPAND | VM_DONTDUMP,
313 NULL);
314}
315
316const char *arch_vma_name(struct vm_area_struct *vma)
317{
318 return (vma->vm_start == 0xffff0000) ? "[vectors]" : NULL;
319}
320
