mirror of
https://github.com/fail0verflow/hbc.git
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108 lines
1.9 KiB
C
108 lines
1.9 KiB
C
#ifndef _LOADER_H_
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#define _LOADER_H_
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#include <stddef.h>
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// Basic types.
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typedef unsigned char u8;
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typedef signed char s8;
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typedef unsigned short int u16;
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typedef signed short int s16;
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typedef unsigned int u32;
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typedef signed int s32;
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// Basic I/O.
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static inline u32 read32(u32 addr) {
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u32 x;
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asm volatile("lwz %0,0(%1) ; sync" : "=r"(x) : "b"(0xc0000000 | addr));
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return x;
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}
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static inline void write32(u32 addr, u32 x) {
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asm("stw %0,0(%1) ; eieio" : : "r"(x), "b"(0xc0000000 | addr));
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}
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static inline u16 read16(u32 addr) {
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u16 x;
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asm volatile("lhz %0,0(%1) ; sync" : "=r"(x) : "b"(0xc0000000 | addr));
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return x;
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}
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static inline u8 read8(u32 addr) {
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u8 x;
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asm volatile("lbz %0,0(%1) ; sync" : "=r"(x) : "b"(0xc0000000 | addr));
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return x;
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}
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static inline void write16(u32 addr, u16 x) {
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asm("sth %0,0(%1) ; eieio" : : "r"(x), "b"(0xc0000000 | addr));
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}
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static inline void write8(u32 addr, u8 x) {
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asm("stb %0,0(%1) ; eieio" : : "r"(x), "b"(0xc0000000 | addr));
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}
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static inline void mask32(u32 addr, u32 clear, u32 set)
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{
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write32(addr, (read32(addr)&(~clear)) | set);
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}
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// Address mapping.
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static inline u32 virt_to_phys(const void *p) {
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return (u32)p & 0x7fffffff;
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}
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static inline void *phys_to_virt(u32 x) {
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return (void *)(x | 0x80000000);
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}
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// Cache synchronisation.
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void sync_before_read(void *p, u32 len);
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void sync_after_write(const void *p, u32 len);
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void sync_before_exec(const void *p, u32 len);
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// Time.
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void udelay(u32 us);
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// Special purpose registers.
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#define mtspr(n, x) do { asm("mtspr %1,%0" : : "r"(x), "i"(n)); } while (0)
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#define mfspr(n) ({ \
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u32 x; asm volatile("mfspr %0,%1" : "=r"(x) : "i"(n)); x; \
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})
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// Exceptions.
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#ifdef NDEBUG
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#define printf(...) { }
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#else
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void exception_init(void);
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void gecko_init(void);
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int printf(const char *fmt, ...);
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#endif
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// Debug: blink the tray led.
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static inline void blink(void) {
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write32(0x0d8000c0, read32(0x0d8000c0) ^ 0x20);
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}
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#endif
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