xyou
f1a2a110d7
Add the current OS source tree, build scripts, system image layout, and development notes covering DMA page allocation, e1000 bring-up, net API dispatch, and DHCP work in progress.
140 lines
4.2 KiB
C
140 lines
4.2 KiB
C
/* DKM PS/2 Keyboard Driver — IRQ1 scan code → ASCII
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* Stage 3, optional, depends on "irq", provides "keyboard".
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* Registers IRQ1 handler, translates scan codes via lookup table.
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*/
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#include <stdint.h>
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/* DKM ABI types */
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#define DKM_DRIVER_MAGIC 0x444B4D31u
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#define DKM_ABI_VERSION 1u
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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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typedef unsigned long long u64;
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typedef long long i64;
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#define NULL ((void *)0)
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struct dkm_log_api {
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void (*info)(const char *msg);
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void (*warn)(const char *msg);
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void (*error)(const char *msg);
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void (*panic)(const char *msg);
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};
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struct dkm_kernel_api {
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u32 version; u32 size; u64 feature_bits;
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const struct dkm_log_api *log;
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const void *mem,*utsm,*irq_api,*pci_api,*dma,*vfs_api,*net,*timer,*drr;
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const void *rsdp_address,*fb_address;
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u64 fb_width,fb_height,fb_pitch; u16 fb_bpp;
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const void *boot_modules_response;
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int (*irq_register)(u8 irq, void *handler);
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};
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struct dkm_driver_handle;
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struct dkm_driver_desc {
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u32 magic; u16 abi_version; u16 desc_size;
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const char *name,*version,*vendor;
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u32 driver_class,stage,flags,priority;
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const char *const *depends; u32 depends_count;
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const char *const *provides; u32 provides_count;
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u64 min_kernel_abi,feature_bits,reserved0,reserved1;
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};
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/* Driver descriptor */
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static const char *const g_depends[] = {"irq"};
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static const char *const g_provides[] = {"keyboard"};
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__attribute__((visibility("default"), used))
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const struct dkm_driver_desc driver_desc = {
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.magic=DKM_DRIVER_MAGIC, .abi_version=DKM_ABI_VERSION,
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.desc_size=sizeof(struct dkm_driver_desc),
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.name="ps2kbd", .version="0.1.0", .vendor="Deshab",
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.driver_class=10, .stage=3, .flags=0, .priority=0,
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.depends=g_depends, .depends_count=1,
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.provides=g_provides, .provides_count=1,
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.min_kernel_abi=1,
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};
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/* Scan code set 1 → ASCII (lowercase) */
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static const char sc_ascii[] = {
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0,0,'1','2','3','4','5','6','7','8','9','0','-','=',0,
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0,'q','w','e','r','t','y','u','i','o','p','[',']',0,
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0,'a','s','d','f','g','h','j','k','l',';','\'','`',0,
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'\\','z','x','c','v','b','n','m',',','.','/',0,
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'*',0,' ',0
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};
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static const struct dkm_log_api *g_log;
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static volatile int g_has_key;
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static volatile u8 g_last_sc;
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/* inline I/O */
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static u8 inb(u16 p) { u8 v; __asm__("inb %1,%0":"=a"(v):"Nd"(p)); return v; }
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static void outb(u16 p, u8 v) { __asm__("outb %0,%1"::"a"(v),"Nd"(p)); }
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static void log_hex(const char *prefix, u64 v) {
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static const char h[]="0123456789abcdef";
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char b[19]; u32 i=0; b[i++]='0'; b[i++]='x';
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for (int j=15;j>=0;j--) b[i++]=h[(v>>(j*4))&0xf];
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b[i]=0; g_log->info(prefix); g_log->info(b);
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}
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static int kbd_handler(u8 irq) {
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(void)irq;
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g_last_sc = inb(0x60);
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g_has_key = 1;
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return 0; /* let kernel send EOI */
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}
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__attribute__((visibility("default")))
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int driver_init(const struct dkm_kernel_api *api,
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struct dkm_driver_handle *handle) {
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(void)handle;
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if (!api||!api->log) return -1;
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g_log=api->log;
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if (!api->irq_register) {
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g_log->warn("[kbd] irq_register not available");
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return 0;
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}
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if (api->irq_register(1, (void*)(uintptr_t)kbd_handler) != 0) {
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g_log->error("[kbd] failed to register IRQ1");
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return -1;
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}
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g_log->info("[kbd] IRQ1 registered, waiting for keypress");
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g_log->info("[kbd] (boot will continue, key echo in ISR)");
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/* spin briefly to show a key echo demo */
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int ticks = 0;
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while (ticks < 200000) {
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if (g_has_key) {
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u8 sc = g_last_sc;
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g_has_key = 0;
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if (sc < 0x80) {
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/* make code */
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log_hex("[kbd] sc=", sc);
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if (sc < sizeof(sc_ascii) && sc_ascii[sc]) {
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char buf[2] = {sc_ascii[sc], 0};
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g_log->info("[kbd] key");
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g_log->info(buf);
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}
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}
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}
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for (volatile int z=0;z<100;z++) {}
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ticks++;
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}
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g_log->info("[kbd] driver ready");
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return 0;
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}
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__attribute__((visibility("default")))
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int driver_exit(struct dkm_driver_handle *handle) {
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(void)handle; return 0;
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}
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