mirror of
https://github.com/FIX94/hbc.git
synced 2024-12-01 23:14:20 +01:00
108 lines
1.9 KiB
C
108 lines
1.9 KiB
C
#ifndef _LOADER_H_
|
|
#define _LOADER_H_
|
|
|
|
#include <stddef.h>
|
|
|
|
// Basic types.
|
|
|
|
typedef unsigned char u8;
|
|
typedef signed char s8;
|
|
typedef unsigned short int u16;
|
|
typedef signed short int s16;
|
|
typedef unsigned int u32;
|
|
typedef signed int s32;
|
|
|
|
// Basic I/O.
|
|
|
|
static inline u32 read32(u32 addr) {
|
|
u32 x;
|
|
|
|
asm volatile("lwz %0,0(%1) ; sync" : "=r"(x) : "b"(0xc0000000 | addr));
|
|
|
|
return x;
|
|
}
|
|
|
|
static inline void write32(u32 addr, u32 x) {
|
|
asm("stw %0,0(%1) ; eieio" : : "r"(x), "b"(0xc0000000 | addr));
|
|
}
|
|
|
|
static inline u16 read16(u32 addr) {
|
|
u16 x;
|
|
|
|
asm volatile("lhz %0,0(%1) ; sync" : "=r"(x) : "b"(0xc0000000 | addr));
|
|
|
|
return x;
|
|
}
|
|
|
|
static inline u8 read8(u32 addr) {
|
|
u8 x;
|
|
|
|
asm volatile("lbz %0,0(%1) ; sync" : "=r"(x) : "b"(0xc0000000 | addr));
|
|
|
|
return x;
|
|
}
|
|
|
|
static inline void write16(u32 addr, u16 x) {
|
|
asm("sth %0,0(%1) ; eieio" : : "r"(x), "b"(0xc0000000 | addr));
|
|
}
|
|
|
|
static inline void write8(u32 addr, u8 x) {
|
|
asm("stb %0,0(%1) ; eieio" : : "r"(x), "b"(0xc0000000 | addr));
|
|
}
|
|
|
|
static inline void mask32(u32 addr, u32 clear, u32 set)
|
|
{
|
|
write32(addr, (read32(addr)&(~clear)) | set);
|
|
}
|
|
|
|
// Address mapping.
|
|
|
|
static inline u32 virt_to_phys(const void *p) {
|
|
return (u32)p & 0x7fffffff;
|
|
}
|
|
|
|
static inline void *phys_to_virt(u32 x) {
|
|
return (void *)(x | 0x80000000);
|
|
}
|
|
|
|
|
|
// Cache synchronisation.
|
|
|
|
void sync_before_read(void *p, u32 len);
|
|
void sync_after_write(const void *p, u32 len);
|
|
void sync_before_exec(const void *p, u32 len);
|
|
|
|
|
|
// Time.
|
|
|
|
void udelay(u32 us);
|
|
|
|
|
|
// Special purpose registers.
|
|
|
|
#define mtspr(n, x) do { asm("mtspr %1,%0" : : "r"(x), "i"(n)); } while (0)
|
|
#define mfspr(n) ({ \
|
|
u32 x; asm volatile("mfspr %0,%1" : "=r"(x) : "i"(n)); x; \
|
|
})
|
|
|
|
|
|
// Exceptions.
|
|
|
|
#ifdef NDEBUG
|
|
#define printf(...) { }
|
|
#else
|
|
void exception_init(void);
|
|
void gecko_init(void);
|
|
int printf(const char *fmt, ...);
|
|
#endif
|
|
|
|
|
|
// Debug: blink the tray led.
|
|
|
|
static inline void blink(void) {
|
|
write32(0x0d8000c0, read32(0x0d8000c0) ^ 0x20);
|
|
}
|
|
|
|
#endif
|
|
|