1
0
mirror of https://gitlab.os-k.eu/os-k-team/kvisc.git synced 2023-08-25 14:05:46 +02:00
kvisc/vm/pc/mem.h
2019-06-26 21:25:59 +02:00

32 lines
1.1 KiB
C

// The OS/K Team licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
static inline ushort bswap16(ushort u)
{ return ((u<<8) | (u>>8)); }
static inline char getmempref(ushort len)
{ return (len==1?'b':(len==2?'w':(len==4?'l':(len==8?'q':'x')))); }
#define MEMOFF (1 * 1024 * 1024)
#define MEMSIZE (16 * 1024 * 1024) // 16MB
#define addr2real(p) (((p) - MEMOFF) / 2)
#define real2addr(p) (((p) + MEMOFF) / 2)
// Address of boot firmware stack
#define FWSTACK (MEMOFF * 2) // 2MB
ulong copystr(ctx_t *ctx, ulong addr, ulong maxn, char *str);
ulong readmem(ctx_t *c, ulong addr, uint len);
void writemem(ctx_t *, ulong val, ulong addr, uint len);
ulong readmemzx(ctx_t *c, ulong addr, uint len);
void writememzx(ctx_t *, ulong val, ulong addr, uint len);
#define SIGN_EXTEND(val, mask) \
(val & ((mask + 1) >> 1) \
? (val | ~mask) \
: val)