39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
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/* mouseInit — safe mouse initializer stub
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* DSK-owned system component initializer.
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* Current version must never block or crash first boot.
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*/
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#include "../UTSM/include/utsm/dsk.h"
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typedef unsigned char u8;
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typedef unsigned short u16;
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typedef unsigned int u32;
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#define COM1 0x3F8
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#define PS2_STATUS 0x64
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static inline void outb(u16 port, u8 value) { __asm__ volatile("outb %0,%1"::"a"(value),"Nd"(port)); }
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static inline u8 inb(u16 port) { u8 v; __asm__ volatile("inb %1,%0":"=a"(v):"Nd"(port)); return v; }
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static void sputc(char c) {
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for (u32 i=0;i<10000;i++) if (inb(COM1+5)&0x20) break;
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outb(COM1,(u8)c);
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}
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static void swrite(const char *s) { while(*s){ if(*s=='\n') sputc('\r'); sputc(*s++);} }
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static void logl(const char *s) { swrite(s); swrite("\n"); }
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__attribute__((visibility("default")))
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void dsk_entry(const dsk_boot_context *ctx) {
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(void)ctx;
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logl("[mouseInit] boot");
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/* Safe first version: do not touch PS/2 controller command path yet.
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The previous implementation could block/reboot on some firmware states.
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Full IRQ12 + packet decoding will be implemented as a later input driver. */
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u8 status = inb(PS2_STATUS);
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(void)status;
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logl("[mouseInit] safe init complete");
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return;
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}
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