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https://source.denx.de/u-boot/u-boot.git
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149 lines
3.0 KiB
C
149 lines
3.0 KiB
C
#include <common.h>
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#include <asm/processor.h>
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#include <memio.h>
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#include <linux/ctype.h>
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static __inline__ unsigned long
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get_msr(void)
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{
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unsigned long msr;
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asm volatile("mfmsr %0" : "=r" (msr) :);
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return msr;
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}
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static __inline__ void
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set_msr(unsigned long msr)
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{
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asm volatile("mtmsr %0" : : "r" (msr));
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}
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static __inline__ unsigned long
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get_dec(void)
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{
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unsigned long val;
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asm volatile("mfdec %0" : "=r" (val) :);
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return val;
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}
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static __inline__ void
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set_dec(unsigned long val)
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{
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asm volatile("mtdec %0" : : "r" (val));
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}
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void
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enable_interrupts(void)
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{
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set_msr (get_msr() | MSR_EE);
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}
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/* returns flag if MSR_EE was set before */
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int
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disable_interrupts(void)
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{
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ulong msr;
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msr = get_msr();
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set_msr (msr & ~MSR_EE);
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return ((msr & MSR_EE) != 0);
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}
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u8 in8(u32 port)
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{
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return in_byte(port);
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}
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void out8(u32 port, u8 val)
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{
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out_byte(port, val);
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}
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unsigned long in32(u32 port)
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{
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return in_long(port);
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}
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unsigned long simple_strtoul(const char *cp,char **endp,unsigned int base)
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{
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unsigned long result = 0,value;
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if (*cp == '0') {
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cp++;
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if ((*cp == 'x') && isxdigit(cp[1])) {
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base = 16;
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cp++;
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}
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if (!base) {
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base = 8;
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}
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}
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if (!base) {
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base = 10;
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}
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while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp)
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? toupper(*cp) : *cp)-'A'+10) < base) {
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result = result*base + value;
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cp++;
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}
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if (endp)
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*endp = (char *)cp;
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return result;
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}
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long simple_strtol(const char *cp,char **endp,unsigned int base)
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{
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if(*cp=='-')
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return -simple_strtoul(cp+1,endp,base);
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return simple_strtoul(cp,endp,base);
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}
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static inline void
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soft_restart(unsigned long addr)
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{
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/* SRR0 has system reset vector, SRR1 has default MSR value */
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/* rfi restores MSR from SRR1 and sets the PC to the SRR0 value */
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__asm__ __volatile__ ("mtspr 26, %0" :: "r" (addr));
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__asm__ __volatile__ ("li 4, (1 << 6)" ::: "r4");
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__asm__ __volatile__ ("mtspr 27, 4");
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__asm__ __volatile__ ("rfi");
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while(1); /* not reached */
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}
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void
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do_reset (void)
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{
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ulong addr;
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/* flush and disable I/D cache */
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__asm__ __volatile__ ("mfspr 3, 1008" ::: "r3");
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__asm__ __volatile__ ("ori 5, 5, 0xcc00" ::: "r5");
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__asm__ __volatile__ ("ori 4, 3, 0xc00" ::: "r4");
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__asm__ __volatile__ ("andc 5, 3, 5" ::: "r5");
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__asm__ __volatile__ ("sync");
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__asm__ __volatile__ ("mtspr 1008, 4");
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__asm__ __volatile__ ("isync");
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__asm__ __volatile__ ("sync");
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__asm__ __volatile__ ("mtspr 1008, 5");
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__asm__ __volatile__ ("isync");
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__asm__ __volatile__ ("sync");
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#ifdef CONFIG_SYS_RESET_ADDRESS
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addr = CONFIG_SYS_RESET_ADDRESS;
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#else
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/*
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* note: when CONFIG_SYS_MONITOR_BASE points to a RAM address,
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* CONFIG_SYS_MONITOR_BASE - sizeof (ulong) is usually a valid
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* address. Better pick an address known to be invalid on your
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* system and assign it to CONFIG_SYS_RESET_ADDRESS.
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*/
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addr = CONFIG_SYS_MONITOR_BASE - sizeof (ulong);
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#endif
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soft_restart(addr);
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while(1); /* not reached */
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}
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