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12#include <stdarg.h>
13
14#include <linux/module.h>
15#include <linux/sched.h>
16#include <linux/sched/debug.h>
17#include <linux/sched/task.h>
18#include <linux/sched/task_stack.h>
19#include <linux/kernel.h>
20#include <linux/mm.h>
21#include <linux/stddef.h>
22#include <linux/unistd.h>
23#include <linux/delay.h>
24#include <linux/reboot.h>
25#include <linux/interrupt.h>
26#include <linux/kallsyms.h>
27#include <linux/init.h>
28#include <linux/cpu.h>
29#include <linux/elfcore.h>
30#include <linux/pm.h>
31#include <linux/tick.h>
32#include <linux/utsname.h>
33#include <linux/uaccess.h>
34#include <linux/random.h>
35#include <linux/gpio.h>
36#include <linux/stacktrace.h>
37
38#include <asm/cacheflush.h>
39#include <asm/processor.h>
40#include <asm/stacktrace.h>
41
42#include "setup.h"
43
44static const char * const processor_modes[] = {
45 "UK00", "UK01", "UK02", "UK03", "UK04", "UK05", "UK06", "UK07",
46 "UK08", "UK09", "UK0A", "UK0B", "UK0C", "UK0D", "UK0E", "UK0F",
47 "USER", "REAL", "INTR", "PRIV", "UK14", "UK15", "UK16", "ABRT",
48 "UK18", "UK19", "UK1A", "EXTN", "UK1C", "UK1D", "UK1E", "SUSR"
49};
50
51void arch_cpu_idle(void)
52{
53 cpu_do_idle();
54 local_irq_enable();
55}
56
57void machine_halt(void)
58{
59 gpio_set_value(GPO_SOFT_OFF, 0);
60}
61
62
63
64
65void (*pm_power_off)(void) = NULL;
66EXPORT_SYMBOL(pm_power_off);
67
68void machine_power_off(void)
69{
70 if (pm_power_off)
71 pm_power_off();
72 machine_halt();
73}
74
75void machine_restart(char *cmd)
76{
77
78 local_irq_disable();
79
80
81
82
83
84
85 setup_mm_for_reboot();
86
87
88 flush_cache_all();
89
90
91 cpu_proc_fin();
92
93
94 flush_cache_all();
95
96
97
98
99 if (reboot_mode == REBOOT_SOFT) {
100
101 cpu_reset(VECTORS_BASE);
102 } else {
103 writel(0x00002001, PM_PLLSYSCFG);
104 writel(0x00100800, PM_PLLDDRCFG);
105 writel(0x00002001, PM_PLLVGACFG);
106
107
108
109 __asm__ __volatile__(
110 " .align 5\n\t"
111 " stw %1, [%0]\n\t"
112 "201: ldw r0, [%0]\n\t"
113 " cmpsub.a r0, #0\n\t"
114 " bne 201b\n\t"
115 " stw %3, [%2]\n\t"
116 " nop; nop; nop\n\t"
117
118 :
119 : "r" (PM_PMCR),
120 "r" (PM_PMCR_CFBSYS | PM_PMCR_CFBDDR
121 | PM_PMCR_CFBVGA),
122 "r" (RESETC_SWRR),
123 "r" (RESETC_SWRR_SRB)
124 : "r0", "memory");
125 }
126
127
128
129
130
131 mdelay(1000);
132 printk(KERN_EMERG "Reboot failed -- System halted\n");
133 do { } while (1);
134}
135
136void __show_regs(struct pt_regs *regs)
137{
138 unsigned long flags;
139 char buf[64];
140
141 show_regs_print_info(KERN_DEFAULT);
142 print_symbol("PC is at %s\n", instruction_pointer(regs));
143 print_symbol("LR is at %s\n", regs->UCreg_lr);
144 printk(KERN_DEFAULT "pc : [<%08lx>] lr : [<%08lx>] psr: %08lx\n"
145 "sp : %08lx ip : %08lx fp : %08lx\n",
146 regs->UCreg_pc, regs->UCreg_lr, regs->UCreg_asr,
147 regs->UCreg_sp, regs->UCreg_ip, regs->UCreg_fp);
148 printk(KERN_DEFAULT "r26: %08lx r25: %08lx r24: %08lx\n",
149 regs->UCreg_26, regs->UCreg_25,
150 regs->UCreg_24);
151 printk(KERN_DEFAULT "r23: %08lx r22: %08lx r21: %08lx r20: %08lx\n",
152 regs->UCreg_23, regs->UCreg_22,
153 regs->UCreg_21, regs->UCreg_20);
154 printk(KERN_DEFAULT "r19: %08lx r18: %08lx r17: %08lx r16: %08lx\n",
155 regs->UCreg_19, regs->UCreg_18,
156 regs->UCreg_17, regs->UCreg_16);
157 printk(KERN_DEFAULT "r15: %08lx r14: %08lx r13: %08lx r12: %08lx\n",
158 regs->UCreg_15, regs->UCreg_14,
159 regs->UCreg_13, regs->UCreg_12);
160 printk(KERN_DEFAULT "r11: %08lx r10: %08lx r9 : %08lx r8 : %08lx\n",
161 regs->UCreg_11, regs->UCreg_10,
162 regs->UCreg_09, regs->UCreg_08);
163 printk(KERN_DEFAULT "r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
164 regs->UCreg_07, regs->UCreg_06,
165 regs->UCreg_05, regs->UCreg_04);
166 printk(KERN_DEFAULT "r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
167 regs->UCreg_03, regs->UCreg_02,
168 regs->UCreg_01, regs->UCreg_00);
169
170 flags = regs->UCreg_asr;
171 buf[0] = flags & PSR_S_BIT ? 'S' : 's';
172 buf[1] = flags & PSR_Z_BIT ? 'Z' : 'z';
173 buf[2] = flags & PSR_C_BIT ? 'C' : 'c';
174 buf[3] = flags & PSR_V_BIT ? 'V' : 'v';
175 buf[4] = '\0';
176
177 printk(KERN_DEFAULT "Flags: %s INTR o%s REAL o%s Mode %s Segment %s\n",
178 buf, interrupts_enabled(regs) ? "n" : "ff",
179 fast_interrupts_enabled(regs) ? "n" : "ff",
180 processor_modes[processor_mode(regs)],
181 uaccess_kernel() ? "kernel" : "user");
182 {
183 unsigned int ctrl;
184
185 buf[0] = '\0';
186 {
187 unsigned int transbase;
188 asm("movc %0, p0.c2, #0\n"
189 : "=r" (transbase));
190 snprintf(buf, sizeof(buf), " Table: %08x", transbase);
191 }
192 asm("movc %0, p0.c1, #0\n" : "=r" (ctrl));
193
194 printk(KERN_DEFAULT "Control: %08x%s\n", ctrl, buf);
195 }
196}
197
198void show_regs(struct pt_regs *regs)
199{
200 printk(KERN_DEFAULT "\n");
201 printk(KERN_DEFAULT "Pid: %d, comm: %20s\n",
202 task_pid_nr(current), current->comm);
203 __show_regs(regs);
204 __backtrace();
205}
206
207void flush_thread(void)
208{
209 struct thread_info *thread = current_thread_info();
210 struct task_struct *tsk = current;
211
212 memset(thread->used_cp, 0, sizeof(thread->used_cp));
213 memset(&tsk->thread.debug, 0, sizeof(struct debug_info));
214#ifdef CONFIG_UNICORE_FPU_F64
215 memset(&thread->fpstate, 0, sizeof(struct fp_state));
216#endif
217}
218
219void release_thread(struct task_struct *dead_task)
220{
221}
222
223asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
224asmlinkage void ret_from_kernel_thread(void) __asm__("ret_from_kernel_thread");
225
226int
227copy_thread(unsigned long clone_flags, unsigned long stack_start,
228 unsigned long stk_sz, struct task_struct *p)
229{
230 struct thread_info *thread = task_thread_info(p);
231 struct pt_regs *childregs = task_pt_regs(p);
232
233 memset(&thread->cpu_context, 0, sizeof(struct cpu_context_save));
234 thread->cpu_context.sp = (unsigned long)childregs;
235 if (unlikely(p->flags & PF_KTHREAD)) {
236 thread->cpu_context.pc = (unsigned long)ret_from_kernel_thread;
237 thread->cpu_context.r4 = stack_start;
238 thread->cpu_context.r5 = stk_sz;
239 memset(childregs, 0, sizeof(struct pt_regs));
240 } else {
241 thread->cpu_context.pc = (unsigned long)ret_from_fork;
242 *childregs = *current_pt_regs();
243 childregs->UCreg_00 = 0;
244 if (stack_start)
245 childregs->UCreg_sp = stack_start;
246
247 if (clone_flags & CLONE_SETTLS)
248 childregs->UCreg_16 = childregs->UCreg_03;
249 }
250 return 0;
251}
252
253
254
255
256int dump_task_regs(struct task_struct *t, elf_gregset_t *elfregs)
257{
258 elf_core_copy_regs(elfregs, task_pt_regs(t));
259 return 1;
260}
261
262
263
264
265int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fp)
266{
267 struct thread_info *thread = current_thread_info();
268 int used_math = thread->used_cp[1] | thread->used_cp[2];
269
270#ifdef CONFIG_UNICORE_FPU_F64
271 if (used_math)
272 memcpy(fp, &thread->fpstate, sizeof(*fp));
273#endif
274 return used_math != 0;
275}
276EXPORT_SYMBOL(dump_fpu);
277
278unsigned long get_wchan(struct task_struct *p)
279{
280 struct stackframe frame;
281 int count = 0;
282 if (!p || p == current || p->state == TASK_RUNNING)
283 return 0;
284
285 frame.fp = thread_saved_fp(p);
286 frame.sp = thread_saved_sp(p);
287 frame.lr = 0;
288 frame.pc = thread_saved_pc(p);
289 do {
290 int ret = unwind_frame(&frame);
291 if (ret < 0)
292 return 0;
293 if (!in_sched_functions(frame.pc))
294 return frame.pc;
295 } while ((count++) < 16);
296 return 0;
297}
298
299unsigned long arch_randomize_brk(struct mm_struct *mm)
300{
301 return randomize_page(mm->brk, 0x02000000);
302}
303
304
305
306
307
308
309
310int vectors_user_mapping(void)
311{
312 struct mm_struct *mm = current->mm;
313 return install_special_mapping(mm, 0xffff0000, PAGE_SIZE,
314 VM_READ | VM_EXEC |
315 VM_MAYREAD | VM_MAYEXEC |
316 VM_DONTEXPAND | VM_DONTDUMP,
317 NULL);
318}
319
320const char *arch_vma_name(struct vm_area_struct *vma)
321{
322 return (vma->vm_start == 0xffff0000) ? "[vectors]" : NULL;
323}
324
