| 49,6 → 49,12 |
|---|
| ; Read through BIOS? |
| cmp [hdpos], 0x80 |
| jae .bios |
| ; hd_read_{dma,pio} use old ATA with 28 bit for sector number |
| cmp eax, 0x10000000 |
| jb @f |
| inc [hd_error] |
| jmp return_01 |
| @@: |
| ; DMA read is permitted if [allow_dma_access]=1 or 2 |
| cmp [allow_dma_access], 2 |
| ja .nodma |
| 235,6 → 241,8 |
|---|
| |
| align 4 |
| cache_write_pio: |
| cmp dword[esi],0x10000000 |
| jae .bad |
| ; call disable_ide_int |
| |
| call wait_for_hd_idle |
| 295,6 → 303,9 |
|---|
| pop esi ecx |
| |
| ret |
| .bad: |
| inc [hd_error] |
| ret |
| |
| save_hd_wait_timeout: |
| |
| 686,6 → 697,9 |
|---|
| write_cache_chain: |
| cmp [hdpos], 0x80 |
| jae bd_write_cache_chain |
| mov eax,[cache_chain_ptr] |
| cmp dword[eax],0x10000000 |
| jae .bad |
| push esi |
| mov eax, IDE_descriptor_table |
| mov edx,eax |
| 779,6 → 793,9 |
|---|
| jnz hd_write_error_dma |
| pop esi |
| ret |
| .bad: |
| inc [hd_error] |
| ret |
| |
| uglobal |
| IDEContrRegsBaseAddr dw ? |
| 882,11 → 899,11 |
|---|
| ; Because this code uses fixed addresses, |
| ; it can not be run simultaniously by many threads. |
| ; In current implementation it is protected by common mutex 'hd1_status' |
| mov word [BOOT_VAR + 510h], 10h ; packet length |
| mov word [BOOT_VAR + 512h], cx ; number of sectors |
| mov dword [BOOT_VAR + 514h], 9A000000h ; buffer 9A00:0000 |
| mov dword [BOOT_VAR + 518h], eax |
| and dword [BOOT_VAR + 51Ch], 0 |
| mov word [OS_BASE + 510h], 10h ; packet length |
| mov word [OS_BASE + 512h], cx ; number of sectors |
| mov dword [OS_BASE + 514h], 9A000000h ; buffer 9A00:0000 |
| mov dword [OS_BASE + 518h], eax |
| and dword [OS_BASE + 51Ch], 0 |
| push ebx ecx esi edi |
| mov ebx, int13_regs_in |
| mov edi, ebx |
| 916,10 → 933,12 |
|---|
| mov [ebx+v86_regs.eflags], 20200h |
| mov esi, [sys_v86_machine] |
| mov ecx, 0x502 |
| push fs |
| call v86_start |
| pop fs |
| and [bios_hdpos], 0 |
| pop edi esi ecx ebx |
| movzx edx, byte [BOOT_VAR + 512h] |
| movzx edx, byte [OS_BASE + 512h] |
| test byte [int13_regs_out+v86_regs.eflags], 1 |
| jnz @f |
| mov edx, ecx |