Deaicup/Deshab-OS
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This commit is contained in:
xyou
2026-07-31 13:53:49 +08:00
parent 5ea84fac97
commit f52157b7af
241 changed files with 26843 additions and 8155 deletions
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CODE/DKM/fat32/fat32.c
+10 -52
View File
@@ -6,60 +6,15 @@
#include <stdint.h>
#include "../dkm_shared.h"
#include "../dkm_instr.h"
DKM_STAT_DECL(fat0_reads);
DKM_STAT_DECL(fat0_fat_walks);
/* ---------------------------------------------------------------
* DKM ABI types
* FAT32-specific types (DKM ABI types come from dkm_shared.h)
* --------------------------------------------------------------- */
#define DKM_DRIVER_MAGIC 0x444B4D31u
#define DKM_ABI_VERSION 1u
typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned int u32;
typedef unsigned long long u64;
typedef long long i64;
#define NULL ((void *)0)
struct dkm_log_api {
void (*info)(const char *msg);
void (*warn)(const char *msg);
void (*error)(const char *msg);
void (*panic)(const char *msg);
};
struct dkm_block_api {
int (*register_device)(const void *desc);
u32 (*device_count)(void);
int (*read)(u32 index, u64 lba, u32 count, void *buffer);
int (*write)(u32 index, u64 lba, u32 count, const void *buffer);
u64 (*sector_size)(u32 index);
const char *(*device_name)(u32 index);
int (*set_write_fn)(u32 index, int (*fn)(void *ctx, u64 lba, u32 count, const void *buf));
};
struct dkm_kernel_api {
u32 version; u32 size; u64 feature_bits;
const struct dkm_log_api *log;
const void *mem,*utsm,*irq,*pci_api,*dma,*vfs_api,*net,*timer,*drr;
const void *rsdp_address;
const void *fb_address;
u64 fb_width,fb_height,fb_pitch; u16 fb_bpp;
const void *boot_modules_response;
int (*irq_register)(u8 irq, void *handler);
u64 hhdm_offset;
const struct dkm_block_api *block;
};
struct dkm_driver_handle;
struct dkm_driver_desc {
u32 magic; u16 abi_version; u16 desc_size;
const char *name,*version,*vendor;
u32 driver_class,stage,flags,priority;
const char *const *depends; u32 depends_count;
const char *const *provides; u32 provides_count;
u64 min_kernel_abi,feature_bits,reserved0,reserved1;
};
struct limine_file {
u64 revision; void *address; u64 size; char *path; char *cmdline; u8 _pad[56];
@@ -237,6 +192,7 @@ int driver_init(const struct dkm_kernel_api *api,
(void)handle;
if (!api||!api->log) return -1;
g_log=api->log;
dkm_instr_init(api);
u64 disk_size = 0;
const u8 *disk = fat32_select_disk_image(api, &disk_size);
@@ -279,6 +235,7 @@ int driver_init(const struct dkm_kernel_api *api,
/* try to read README.TXT content */
if (strneq(dir[e].name,"README TXT",11)) {
DKM_STAT_INC(fat0_reads);
u32 f_clus = read_u16_le((const u8*)&dir[e].cluster_low);
u32 f_off = data_start + (f_clus - 2)*cluster_size;
u32 f_size = dir[e].file_size;
@@ -297,6 +254,7 @@ int driver_init(const struct dkm_kernel_api *api,
/* read next cluster from FAT */
u32 fat_ent_off = fat_start + clus * 4;
clus = read_u32_le(disk + fat_ent_off) & 0x0FFFFFFF;
DKM_STAT_INC(fat0_fat_walks);
}
g_log->info("[fat32] driver ready");