Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 | #include <common.h> #include <asm/processor.h> #include <memio.h> #include <linux/ctype.h> static __inline__ unsigned long get_msr(void) { unsigned long msr; asm volatile("mfmsr %0" : "=r" (msr) :); return msr; } static __inline__ void set_msr(unsigned long msr) { asm volatile("mtmsr %0" : : "r" (msr)); } static __inline__ unsigned long get_dec(void) { unsigned long val; asm volatile("mfdec %0" : "=r" (val) :); return val; } static __inline__ void set_dec(unsigned long val) { asm volatile("mtdec %0" : : "r" (val)); } void enable_interrupts(void) { set_msr (get_msr() | MSR_EE); } /* returns flag if MSR_EE was set before */ int disable_interrupts(void) { ulong msr; msr = get_msr(); set_msr (msr & ~MSR_EE); return ((msr & MSR_EE) != 0); } u8 in8(u32 port) { return in_byte(port); } void out8(u32 port, u8 val) { out_byte(port, val); } unsigned long in32(u32 port) { return in_long(port); } unsigned long simple_strtoul(const char *cp,char **endp,unsigned int base) { unsigned long result = 0,value; if (*cp == '0') { cp++; if ((*cp == 'x') && isxdigit(cp[1])) { base = 16; cp++; } if (!base) { base = 8; } } if (!base) { base = 10; } while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp) ? toupper(*cp) : *cp)-'A'+10) < base) { result = result*base + value; cp++; } if (endp) *endp = (char *)cp; return result; } long simple_strtol(const char *cp,char **endp,unsigned int base) { if(*cp=='-') return -simple_strtoul(cp+1,endp,base); return simple_strtoul(cp,endp,base); } static inline void soft_restart(unsigned long addr) { /* SRR0 has system reset vector, SRR1 has default MSR value */ /* rfi restores MSR from SRR1 and sets the PC to the SRR0 value */ __asm__ __volatile__ ("mtspr 26, %0" :: "r" (addr)); __asm__ __volatile__ ("li 4, (1 << 6)" ::: "r4"); __asm__ __volatile__ ("mtspr 27, 4"); __asm__ __volatile__ ("rfi"); while(1); /* not reached */ } void do_reset (void) { ulong addr; /* flush and disable I/D cache */ __asm__ __volatile__ ("mfspr 3, 1008" ::: "r3"); __asm__ __volatile__ ("ori 5, 5, 0xcc00" ::: "r5"); __asm__ __volatile__ ("ori 4, 3, 0xc00" ::: "r4"); __asm__ __volatile__ ("andc 5, 3, 5" ::: "r5"); __asm__ __volatile__ ("sync"); __asm__ __volatile__ ("mtspr 1008, 4"); __asm__ __volatile__ ("isync"); __asm__ __volatile__ ("sync"); __asm__ __volatile__ ("mtspr 1008, 5"); __asm__ __volatile__ ("isync"); __asm__ __volatile__ ("sync"); #ifdef CFG_RESET_ADDRESS addr = CFG_RESET_ADDRESS; #else /* * note: when CFG_MONITOR_BASE points to a RAM address, * CFG_MONITOR_BASE - sizeof (ulong) is usually a valid * address. Better pick an address known to be invalid on your * system and assign it to CFG_RESET_ADDRESS. */ addr = CFG_MONITOR_BASE - sizeof (ulong); #endif soft_restart(addr); while(1); /* not reached */ } |