82 lines
1.3 KiB
C
82 lines
1.3 KiB
C
// IO Port Access Type Purpose
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// 0x60 Read/Write Data Port
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// 0x64 Read Status Register
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// 0x64 Write Command Register
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#define TABWIDTH 8
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#ifndef BOOT_DEBUG
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#define BOOT_DEBUG 1
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#endif
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enum{
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CON_PC,
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CON_SRI,
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CON_END,
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};
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struct BIOSreg{
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u32 ax;
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u32 cx;
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u32 dx;
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u32 bx;
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u32 bp;
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u32 si;
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u32 di;
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u32 ds;
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u32 es;
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}__attribute__((packed));
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typedef struct{
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char *name;
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void (**probes)(void);
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uint cnt;
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}BootProbe;
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typedef struct ConDev ConDev;
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struct ConDev{
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int (*probe)(ConDev*);
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void (*init)(ConDev *);
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int (*getc)(int);
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void (*putc)(int, int);
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uint dev;
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uchar pri; // the higher the better
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};
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typedef struct{
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u64 addr; /* Beginning of block */
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u64 size; /* Size of block */
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u32 type; /* Type of block */
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} __attribute__((packed)) BIOSmmap;
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// fmt.c
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typedef struct{
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int ucase;
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int padch;
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char *p;
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char *ep;
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int f1, f2, f3;
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va_list ap;
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}Op;
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// disk.c
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typedef struct{
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int n;
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u32 ncyl;
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u32 nhead;
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u32 nsec;
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i32 edd;
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u32 dev ;
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u32 checksum;
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u32 flag;
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} __attribute__((packed)) BIOSdisk;
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// gdt.S
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extern volatile struct BIOSreg BIOSreg;
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// boot.c
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extern void (*probe1[])(void);
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extern void (*probe2[])(void);
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extern BootProbe probes[];
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extern BIOSmmap biosmmap[64];
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extern ConDev contab[CON_END];
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extern ConDev *con;
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extern uint cnvmem, extmem;
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extern int debug; |