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12#include <stdarg.h>
13
14#include <linux/module.h>
15#include <linux/sched.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/kallsyms.h>
24#include <linux/init.h>
25#include <linux/cpu.h>
26#include <linux/elfcore.h>
27#include <linux/pm.h>
28#include <linux/tick.h>
29#include <linux/utsname.h>
30#include <linux/uaccess.h>
31#include <linux/random.h>
32#include <linux/gpio.h>
33#include <linux/stacktrace.h>
34
35#include <asm/cacheflush.h>
36#include <asm/processor.h>
37#include <asm/stacktrace.h>
38
39#include "setup.h"
40
41static const char * const processor_modes[] = {
42 "UK00", "UK01", "UK02", "UK03", "UK04", "UK05", "UK06", "UK07",
43 "UK08", "UK09", "UK0A", "UK0B", "UK0C", "UK0D", "UK0E", "UK0F",
44 "USER", "REAL", "INTR", "PRIV", "UK14", "UK15", "UK16", "ABRT",
45 "UK18", "UK19", "UK1A", "EXTN", "UK1C", "UK1D", "UK1E", "SUSR"
46};
47
48void arch_cpu_idle(void)
49{
50 cpu_do_idle();
51 local_irq_enable();
52}
53
54void machine_halt(void)
55{
56 gpio_set_value(GPO_SOFT_OFF, 0);
57}
58
59
60
61
62void (*pm_power_off)(void) = NULL;
63EXPORT_SYMBOL(pm_power_off);
64
65void machine_power_off(void)
66{
67 if (pm_power_off)
68 pm_power_off();
69 machine_halt();
70}
71
72void machine_restart(char *cmd)
73{
74
75 local_irq_disable();
76
77
78
79
80
81
82 setup_mm_for_reboot();
83
84
85 flush_cache_all();
86
87
88 cpu_proc_fin();
89
90
91 flush_cache_all();
92
93
94
95
96 if (reboot_mode == REBOOT_SOFT) {
97
98 cpu_reset(VECTORS_BASE);
99 } else {
100 writel(0x00002001, PM_PLLSYSCFG);
101 writel(0x00100800, PM_PLLDDRCFG);
102 writel(0x00002001, PM_PLLVGACFG);
103
104
105
106 __asm__ __volatile__(
107 " .align 5\n\t"
108 " stw %1, [%0]\n\t"
109 "201: ldw r0, [%0]\n\t"
110 " cmpsub.a r0, #0\n\t"
111 " bne 201b\n\t"
112 " stw %3, [%2]\n\t"
113 " nop; nop; nop\n\t"
114
115 :
116 : "r" (PM_PMCR),
117 "r" (PM_PMCR_CFBSYS | PM_PMCR_CFBDDR
118 | PM_PMCR_CFBVGA),
119 "r" (RESETC_SWRR),
120 "r" (RESETC_SWRR_SRB)
121 : "r0", "memory");
122 }
123
124
125
126
127
128 mdelay(1000);
129 printk(KERN_EMERG "Reboot failed -- System halted\n");
130 do { } while (1);
131}
132
133void __show_regs(struct pt_regs *regs)
134{
135 unsigned long flags;
136 char buf[64];
137
138 show_regs_print_info(KERN_DEFAULT);
139 print_symbol("PC is at %s\n", instruction_pointer(regs));
140 print_symbol("LR is at %s\n", regs->UCreg_lr);
141 printk(KERN_DEFAULT "pc : [<%08lx>] lr : [<%08lx>] psr: %08lx\n"
142 "sp : %08lx ip : %08lx fp : %08lx\n",
143 regs->UCreg_pc, regs->UCreg_lr, regs->UCreg_asr,
144 regs->UCreg_sp, regs->UCreg_ip, regs->UCreg_fp);
145 printk(KERN_DEFAULT "r26: %08lx r25: %08lx r24: %08lx\n",
146 regs->UCreg_26, regs->UCreg_25,
147 regs->UCreg_24);
148 printk(KERN_DEFAULT "r23: %08lx r22: %08lx r21: %08lx r20: %08lx\n",
149 regs->UCreg_23, regs->UCreg_22,
150 regs->UCreg_21, regs->UCreg_20);
151 printk(KERN_DEFAULT "r19: %08lx r18: %08lx r17: %08lx r16: %08lx\n",
152 regs->UCreg_19, regs->UCreg_18,
153 regs->UCreg_17, regs->UCreg_16);
154 printk(KERN_DEFAULT "r15: %08lx r14: %08lx r13: %08lx r12: %08lx\n",
155 regs->UCreg_15, regs->UCreg_14,
156 regs->UCreg_13, regs->UCreg_12);
157 printk(KERN_DEFAULT "r11: %08lx r10: %08lx r9 : %08lx r8 : %08lx\n",
158 regs->UCreg_11, regs->UCreg_10,
159 regs->UCreg_09, regs->UCreg_08);
160 printk(KERN_DEFAULT "r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
161 regs->UCreg_07, regs->UCreg_06,
162 regs->UCreg_05, regs->UCreg_04);
163 printk(KERN_DEFAULT "r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
164 regs->UCreg_03, regs->UCreg_02,
165 regs->UCreg_01, regs->UCreg_00);
166
167 flags = regs->UCreg_asr;
168 buf[0] = flags & PSR_S_BIT ? 'S' : 's';
169 buf[1] = flags & PSR_Z_BIT ? 'Z' : 'z';
170 buf[2] = flags & PSR_C_BIT ? 'C' : 'c';
171 buf[3] = flags & PSR_V_BIT ? 'V' : 'v';
172 buf[4] = '\0';
173
174 printk(KERN_DEFAULT "Flags: %s INTR o%s REAL o%s Mode %s Segment %s\n",
175 buf, interrupts_enabled(regs) ? "n" : "ff",
176 fast_interrupts_enabled(regs) ? "n" : "ff",
177 processor_modes[processor_mode(regs)],
178 segment_eq(get_fs(), get_ds()) ? "kernel" : "user");
179 {
180 unsigned int ctrl;
181
182 buf[0] = '\0';
183 {
184 unsigned int transbase;
185 asm("movc %0, p0.c2, #0\n"
186 : "=r" (transbase));
187 snprintf(buf, sizeof(buf), " Table: %08x", transbase);
188 }
189 asm("movc %0, p0.c1, #0\n" : "=r" (ctrl));
190
191 printk(KERN_DEFAULT "Control: %08x%s\n", ctrl, buf);
192 }
193}
194
195void show_regs(struct pt_regs *regs)
196{
197 printk(KERN_DEFAULT "\n");
198 printk(KERN_DEFAULT "Pid: %d, comm: %20s\n",
199 task_pid_nr(current), current->comm);
200 __show_regs(regs);
201 __backtrace();
202}
203
204
205
206
207void exit_thread(void)
208{
209}
210
211void flush_thread(void)
212{
213 struct thread_info *thread = current_thread_info();
214 struct task_struct *tsk = current;
215
216 memset(thread->used_cp, 0, sizeof(thread->used_cp));
217 memset(&tsk->thread.debug, 0, sizeof(struct debug_info));
218#ifdef CONFIG_UNICORE_FPU_F64
219 memset(&thread->fpstate, 0, sizeof(struct fp_state));
220#endif
221}
222
223void release_thread(struct task_struct *dead_task)
224{
225}
226
227asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
228asmlinkage void ret_from_kernel_thread(void) __asm__("ret_from_kernel_thread");
229
230int
231copy_thread(unsigned long clone_flags, unsigned long stack_start,
232 unsigned long stk_sz, struct task_struct *p)
233{
234 struct thread_info *thread = task_thread_info(p);
235 struct pt_regs *childregs = task_pt_regs(p);
236
237 memset(&thread->cpu_context, 0, sizeof(struct cpu_context_save));
238 thread->cpu_context.sp = (unsigned long)childregs;
239 if (unlikely(p->flags & PF_KTHREAD)) {
240 thread->cpu_context.pc = (unsigned long)ret_from_kernel_thread;
241 thread->cpu_context.r4 = stack_start;
242 thread->cpu_context.r5 = stk_sz;
243 memset(childregs, 0, sizeof(struct pt_regs));
244 } else {
245 thread->cpu_context.pc = (unsigned long)ret_from_fork;
246 *childregs = *current_pt_regs();
247 childregs->UCreg_00 = 0;
248 if (stack_start)
249 childregs->UCreg_sp = stack_start;
250
251 if (clone_flags & CLONE_SETTLS)
252 childregs->UCreg_16 = childregs->UCreg_03;
253 }
254 return 0;
255}
256
257
258
259
260int dump_task_regs(struct task_struct *t, elf_gregset_t *elfregs)
261{
262 elf_core_copy_regs(elfregs, task_pt_regs(t));
263 return 1;
264}
265
266
267
268
269int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fp)
270{
271 struct thread_info *thread = current_thread_info();
272 int used_math = thread->used_cp[1] | thread->used_cp[2];
273
274#ifdef CONFIG_UNICORE_FPU_F64
275 if (used_math)
276 memcpy(fp, &thread->fpstate, sizeof(*fp));
277#endif
278 return used_math != 0;
279}
280EXPORT_SYMBOL(dump_fpu);
281
282unsigned long get_wchan(struct task_struct *p)
283{
284 struct stackframe frame;
285 int count = 0;
286 if (!p || p == current || p->state == TASK_RUNNING)
287 return 0;
288
289 frame.fp = thread_saved_fp(p);
290 frame.sp = thread_saved_sp(p);
291 frame.lr = 0;
292 frame.pc = thread_saved_pc(p);
293 do {
294 int ret = unwind_frame(&frame);
295 if (ret < 0)
296 return 0;
297 if (!in_sched_functions(frame.pc))
298 return frame.pc;
299 } while ((count++) < 16);
300 return 0;
301}
302
303unsigned long arch_randomize_brk(struct mm_struct *mm)
304{
305 unsigned long range_end = mm->brk + 0x02000000;
306 return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
307}
308
309
310
311
312
313
314
315int vectors_user_mapping(void)
316{
317 struct mm_struct *mm = current->mm;
318 return install_special_mapping(mm, 0xffff0000, PAGE_SIZE,
319 VM_READ | VM_EXEC |
320 VM_MAYREAD | VM_MAYEXEC |
321 VM_DONTEXPAND | VM_DONTDUMP,
322 NULL);
323}
324
325const char *arch_vma_name(struct vm_area_struct *vma)
326{
327 return (vma->vm_start == 0xffff0000) ? "[vectors]" : NULL;
328}
329
