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double buffer ?

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This commit is contained in:
catfood 2023-01-09 10:26:28 +08:00
parent 7645cffff8
commit cb05f80860
3 changed files with 74 additions and 75 deletions
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16
include/bga.h
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@ -2,11 +2,15 @@
#include "pci.h"
#include "type.h"
#define BGA_SWAP_BUFFERS 0x0101
#define BGA_GET_HEIGHT 0x0102
#define BGA_GET_WIDTH 0x0103
#define BGA_GET_SCALE 0x0104
#define BGA_DISABLE 0x0105
#define BGA_SWAP_BUFFERS 0x0101
#define BGA_GET_HEIGHT 0x0102
#define BGA_GET_WIDTH 0x0103
#define BGA_GET_SCALE 0x0104
#define BGA_DISABLE 0x0105
#define BGA_SET_WIDTH 0x0106
#define BGA_SET_HEIGHT 0x0107
#define BGA_SET_UPDATE 0x0108
#define BGA_GET_BUFFER 0x0109
int bga_init_with_dev(pci_dev_t* dev);
int init_bga(pci_dev_t* dev);
int bga_ioctl(uintptr_t cmd, uintptr_t arg);

131
kernel/bga.c
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@ -1,19 +1,20 @@
#include "type.h"
#include "bga.h"
#include "assert.h"
#include "console.h"
#include "const.h"
#include "global.h"
#include "keyboard.h"
#include "memman.h"
#include "pci.h"
#include "proc.h"
#include "protect.h"
#include "proto.h"
#include "stdio.h"
#include "string.h"
#include "x86.h"
#include "global.h"
#include "tty.h"
#include "pci.h"
#include "bga.h"
#include "type.h"
#include "x86.h"
#define VBE_DISPI_IOPORT_INDEX 0x01CE
#define VBE_DISPI_IOPORT_DATA 0x01CF
@ -37,20 +38,17 @@ static uint16_t bga_screen_width, bga_screen_height;
static uint32_t bga_screen_line_size, bga_screen_buffer_size;
static uint32_t bga_buf_paddr;
static inline void _bga_write_reg(uint16_t cmd, uint16_t data)
{
static inline void _bga_write_reg(uint16_t cmd, uint16_t data) {
outw(VBE_DISPI_IOPORT_INDEX, cmd);
outw(VBE_DISPI_IOPORT_DATA, data);
}
static inline uint16_t _bga_read_reg(uint16_t cmd)
{
static inline uint16_t _bga_read_reg(uint16_t cmd) {
outw(VBE_DISPI_IOPORT_INDEX, cmd);
return inw(VBE_DISPI_IOPORT_DATA);
}
static void _bga_set_resolution(uint16_t width, uint16_t height)
{
static void _bga_set_resolution(uint16_t width, uint16_t height) {
_bga_write_reg(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_DISABLED);
_bga_write_reg(VBE_DISPI_INDEX_XRES, width);
_bga_write_reg(VBE_DISPI_INDEX_YRES, height);
@ -59,82 +57,79 @@ static void _bga_set_resolution(uint16_t width, uint16_t height)
_bga_write_reg(VBE_DISPI_INDEX_BPP, 32);
_bga_write_reg(VBE_DISPI_INDEX_X_OFFSET, 0);
_bga_write_reg(VBE_DISPI_INDEX_Y_OFFSET, 0);
_bga_write_reg(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
_bga_write_reg(VBE_DISPI_INDEX_ENABLE,
VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
_bga_write_reg(VBE_DISPI_INDEX_BANK, 0);
bga_screen_line_size = (uint32_t)width * 4;
}
int bga_ioctl(uintptr_t cmd, uintptr_t arg)
{
uint32_t y_offset = 0;
switch (cmd) {
case BGA_GET_HEIGHT:
return bga_screen_height;
case BGA_GET_WIDTH:
return bga_screen_width;
case BGA_GET_SCALE:
return 1;
case BGA_SWAP_BUFFERS:
y_offset = bga_screen_height * (arg & 1);
_bga_write_reg(VBE_DISPI_INDEX_Y_OFFSET, (uint16_t)y_offset);
return 0;
case BGA_DISABLE:
_bga_write_reg(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_DISABLED);
return 0;
default:
return -1;
}
}
// static memzone_t* _bga_mmap(file_t* file, mmap_params_t* params)
// {
// bool map_shared = ((params->flags & MAP_SHARED) > 0);
// if (!map_shared) {
// return 0;
// }
// memzone_t* zone = memzone_new_random(RUNNING_THREAD->process->address_space, bga_screen_buffer_size);
// if (!zone) {
// return 0;
// }
// zone->mmu_flags |= MMU_FLAG_PERM_WRITE | MMU_FLAG_PERM_READ | MMU_FLAG_UNCACHED;
// zone->type |= ZONE_TYPE_DEVICE;
// zone->file = file_duplicate(file);
// zone->ops = &mmap_file_vm_ops;
// for (int offset = 0; offset < bga_screen_buffer_size; offset += VMM_PAGE_SIZE) {
// vmm_map_page(zone->vaddr + offset, bga_buf_paddr + offset, zone->mmu_flags);
// }
// return zone;
// }
static void bga_set_resolution(uint32_t width, uint32_t height)
{
static void bga_set_resolution(uint32_t width, uint32_t height) {
_bga_set_resolution(width, height);
bga_screen_width = width;
bga_screen_height = height;
bga_screen_buffer_size = bga_screen_line_size * height * 2;
}
int bga_ioctl(uintptr_t cmd, uintptr_t arg) {
uint32_t y_offset = 0;
switch (cmd) {
case BGA_GET_HEIGHT:
return bga_screen_height;
case BGA_GET_WIDTH:
return bga_screen_width;
case BGA_GET_SCALE:
return 1;
case BGA_GET_BUFFER:
if (arg == 0)
return bga_buf_paddr;
else
return bga_buf_paddr + bga_screen_buffer_size / 2;
case BGA_SWAP_BUFFERS:
y_offset = bga_screen_height * (arg & 1);
_bga_write_reg(VBE_DISPI_INDEX_Y_OFFSET, (uint16_t)y_offset);
return 0;
case BGA_DISABLE:
_bga_write_reg(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_DISABLED);
return 0;
case BGA_SET_WIDTH:
bga_screen_width = arg;
return 0;
case BGA_SET_HEIGHT:
bga_screen_height = arg;
return 0;
case BGA_SET_UPDATE:
bga_set_resolution(bga_screen_width, bga_screen_height);
return 0;
default:
return -1;
}
}
int bga_init_with_dev(pci_dev_t* dev)
{
int init_bga(pci_dev_t *dev) {
if (dev->type != DEVICE_DISPLAY) {
return -1;
}
bga_buf_paddr = pci_read_bar(dev, 0) & 0xfffffff0;
bga_set_resolution(1024, 768);
kprintf("bga buf paddr=%p; buf size= %d KB\n", bga_buf_paddr, bga_screen_buffer_size / 1024);
kprintf("bga buf paddr=%p; buf size= %d KB\n", bga_buf_paddr,
bga_screen_buffer_size / 1024);
for (int k = 0; k < bga_screen_buffer_size; k += 4096) {
klin_mapping_phy(bga_buf_paddr + k, bga_buf_paddr + k, PG_P | PG_USU | PG_RWW, PG_P | PG_USU | PG_RWW);
klin_mapping_phy(bga_buf_paddr + k, bga_buf_paddr + k,
PG_P | PG_USU | PG_RWW, PG_P | PG_USU | PG_RWW);
}
uint32_t *test = (uint32_t *)bga_buf_paddr;
for (int i = 0; i <= 1024*20; ++ i) test[i] = 0xff3312;
// uint32_t *test = (uint32_t *)bga_buf_paddr;
// uint32_t *test2 = (uint32_t *)(bga_buf_paddr + bga_screen_buffer_size / 2);
// for (int i = 0; i <= 1024 * 20; ++i) test[i] = 0x00ff12;
// for (int i = 1024 * 20; i <= 1024 * 40; ++i) test2[i] = 0x0000ff;
// while (1) {
// bga_ioctl(BGA_SWAP_BUFFERS, 1);
// for (volatile int i = 0; i < 0x03ffffff; ++i)
// ;
// bga_ioctl(BGA_SWAP_BUFFERS, 0);
// for (volatile int i = 0; i < 0x03ffffff; ++i)
// ;
// }
return 0;
}

2
kernel/main.c
View File

@ -47,7 +47,7 @@ int kernel_main()
init_tty_main();
init_pci();
pci_dev_t* dev_bga = get_pci_bga();
bga_init_with_dev(dev_bga);
init_bga(dev_bga);
kprintf("cr3 ready= %p\n", cr3_ready);
// initialize PCBs, added by xw, 18/5/26
error = initialize_processes();