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提交 f975ef51 编写于 作者: B Bernard Xiong 提交者： GitHub
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Merge pull request #807 from parai/master 

[BSP] x86: add floppy driver
上级 2a6726a5 bafa3a8e
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Showing with 714 addition and 75 deletion
bsp/x86/applications/application.c
浏览文件 @ f975ef51
/** File : application.c
/*
* File : application.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2012, RT-Thread Develop Team
* COPYRIGHT (C) 2006 - 2015, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://openlab.rt-thread.com/license/LICENSE
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Change Logs:
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2006-09-15 QiuYi the first version
*/
/**
* @addtogroup QEMU
* 2009-01-05 Bernard the first version
*/
/*@{*/
#include <rtthread.h>
ALIGN(RT_ALIGN_SIZE)
static char thread_led1_stack[1024];
struct rt_thread thread_led1;
static void rt_thread_entry_led1(void *parameter)
#ifdef RT_USING_DFS
#include <dfs_fs.h>
#include "floppy.h"
#endif
/* components initialization for simulator */
void components_init(void)
{
unsigned int count=0;
#ifdef RT_USING_DFS
rt_floppy_init();
/* initialize the device file system */
dfs_init();
while (1)
{
/* led1 on */
#ifndef RT_USING_FINSH
rt_kprintf("led1 on,count : %d\r\n",count);
#ifdef RT_USING_DFS_ELMFAT
/* initialize the elm chan FatFS file system*/
elm_init();
#endif
count ++;
/* sleep 0.5 second and switch to other thread */
rt_thread_delay(RT_TICK_PER_SECOND / 2);
/* led1 off */
#ifndef RT_USING_FINSH
rt_kprintf("led1 off\r\n");
#endif
rt_thread_delay(RT_TICK_PER_SECOND / 2);
}
}
ALIGN(RT_ALIGN_SIZE)
static char thread_led2_stack[1024];
struct rt_thread thread_led2;
void rt_thread_entry_led2(void *parameter)
void rt_init_thread_entry(void *parameter)
{
unsigned int count=0;
components_init();
while (1)
/* File system Initialization */
#ifdef RT_USING_DFS
{
/* led2 on */
#ifndef RT_USING_FINSH
rt_kprintf("led2 on,count : %d\r\n",count);
#endif
count ++;
rt_thread_delay(RT_TICK_PER_SECOND);
/* led2 off */
#ifndef RT_USING_FINSH
rt_kprintf("led2 off\r\n");
#ifdef RT_USING_DFS_ELMFAT
/* mount sd card fatfs as root directory */
if (dfs_mount("floppy", "/", "elm", 0, 0) == 0)
rt_kprintf("fatfs initialized!\n");
else
rt_kprintf("fatfs initialization failed!\n");
#endif
rt_thread_delay(RT_TICK_PER_SECOND);
}
#endif
}
/**
* This function will be invoked to initalize user application when system
* startup.
*/
int rt_application_init(void)
int rt_application_init()
{
// init led1 thread
rt_thread_init(&thread_led1,
"led1",
rt_thread_entry_led1,
RT_NULL,
&thread_led1_stack[0],
sizeof(thread_led1_stack),11,5);
rt_thread_startup(&thread_led1);
rt_thread_t tid;
// init led2 thread
rt_thread_init(&thread_led2,
"led2",
rt_thread_entry_led2,
RT_NULL,
&thread_led2_stack[0],
sizeof(thread_led2_stack),12,5);
rt_thread_startup(&thread_led2);
tid = rt_thread_create("init",
rt_init_thread_entry, RT_NULL,
2048, RT_THREAD_PRIORITY_MAX / 3, 20);
if (tid != RT_NULL)
rt_thread_startup(tid);
return 0;
}
/*@}*/
bsp/x86/drivers/dma.h 0 → 100644
浏览文件 @ f975ef51
#ifndef _DMA_H
#define _DMA_H
#define MAX_DMA_CHANNELS 8
/* 8237 DMA controllers */
#define IO_DMA1_BASE 0x00 /* 8 bit slave DMA, channels 0..3 */
#define IO_DMA2_BASE 0xC0 /* 16 bit master DMA, ch 4(=slave input)..7 */
/* DMA controller registers */
#define DMA1_CMD_REG 0x08 /* command register (w) */
#define DMA1_STAT_REG 0x08 /* status register (r) */
#define DMA1_REQ_REG 0x09 /* request register (w) */
#define DMA1_MASK_REG 0x0A /* single-channel mask (w) */
#define DMA1_MODE_REG 0x0B /* mode register (w) */
#define DMA1_CLEAR_FF_REG 0x0C /* clear pointer flip-flop (w) */
#define DMA1_TEMP_REG 0x0D /* Temporary Register (r) */
#define DMA1_RESET_REG 0x0D /* Master Clear (w) */
#define DMA1_CLR_MASK_REG 0x0E /* Clear Mask */
#define DMA1_MASK_ALL_REG 0x0F /* all-channels mask (w) */
#define DMA2_CMD_REG 0xD0 /* command register (w) */
#define DMA2_STAT_REG 0xD0 /* status register (r) */
#define DMA2_REQ_REG 0xD2 /* request register (w) */
#define DMA2_MASK_REG 0xD4 /* single-channel mask (w) */
#define DMA2_MODE_REG 0xD6 /* mode register (w) */
#define DMA2_CLEAR_FF_REG 0xD8 /* clear pointer flip-flop (w) */
#define DMA2_TEMP_REG 0xDA /* Temporary Register (r) */
#define DMA2_RESET_REG 0xDA /* Master Clear (w) */
#define DMA2_CLR_MASK_REG 0xDC /* Clear Mask */
#define DMA2_MASK_ALL_REG 0xDE /* all-channels mask (w) */
#define DMA_ADDR_0 0x00 /* DMA address registers */
#define DMA_ADDR_1 0x02
#define DMA_ADDR_2 0x04
#define DMA_ADDR_3 0x06
#define DMA_ADDR_4 0xC0
#define DMA_ADDR_5 0xC4
#define DMA_ADDR_6 0xC8
#define DMA_ADDR_7 0xCC
#define DMA_CNT_0 0x01 /* DMA count registers */
#define DMA_CNT_1 0x03
#define DMA_CNT_2 0x05
#define DMA_CNT_3 0x07
#define DMA_CNT_4 0xC2
#define DMA_CNT_5 0xC6
#define DMA_CNT_6 0xCA
#define DMA_CNT_7 0xCE
#define DMA_PAGE_0 0x87 /* DMA page registers */
#define DMA_PAGE_1 0x83
#define DMA_PAGE_2 0x81
#define DMA_PAGE_3 0x82
#define DMA_PAGE_5 0x8B
#define DMA_PAGE_6 0x89
#define DMA_PAGE_7 0x8A
#define DMA_MODE_READ 0x44 /* I/O to memory, no autoinit, increment, single mode */
#define DMA_MODE_WRITE 0x48 /* memory to I/O, no autoinit, increment, single mode */
#define DMA_MODE_CASCADE 0xC0 /* pass thru DREQ->HRQ, DACK<-HLDA only */
/*
* 启用指定的DMA通道
*/
static __inline__ void EnableDma(unsigned int dmanr)
{
if (dmanr<=3)
OUTB(dmanr, DMA1_MASK_REG);
else
OUTB(dmanr & 3, DMA2_MASK_REG);
}
/*
* 禁用指定的DMA通道
*/
static __inline__ void DisableDma(unsigned int dmanr)
{
if (dmanr<=3)
OUTB(dmanr | 4, DMA1_MASK_REG);
else
OUTB((dmanr & 3) | 4, DMA2_MASK_REG);
}
/*
* 清空DMA 晶体计数器
*/
static __inline__ void ClearDmaFF(unsigned int dmanr)
{
if (dmanr<=3)
OUTB(0, DMA1_CLEAR_FF_REG);
else
OUTB(0, DMA2_CLEAR_FF_REG);
}
/*
* 清空DMA 晶体计数器
*/
static __inline__ void SetDmaMode(unsigned int dmanr, char mode)
{
if (dmanr<=3)
OUTB(mode | dmanr, DMA1_MODE_REG);
else
OUTB(mode | (dmanr&3), DMA2_MODE_REG);
}
/*
* 设定DMA 页面寄存器
*/
static __inline__ void SetDmaPage(unsigned int dmanr, char pagenr)
{
switch(dmanr) {
case 0:
OUTB(pagenr, DMA_PAGE_0);
break;
case 1:
OUTB(pagenr, DMA_PAGE_1);
break;
case 2:
OUTB(pagenr, DMA_PAGE_2);
break;
case 3:
OUTB(pagenr, DMA_PAGE_3);
break;
case 5:
OUTB(pagenr & 0xfe, DMA_PAGE_5);
break;
case 6:
OUTB(pagenr & 0xfe, DMA_PAGE_6);
break;
case 7:
OUTB(pagenr & 0xfe, DMA_PAGE_7);
break;
}
}
/*
* 设定DMA 传输高速缓冲区地址
*/
static __inline__ void SetDmaAddr(unsigned int dmanr, unsigned int a)
{
SetDmaPage(dmanr, a>>16);
if (dmanr <= 3) {
OUTB( a & 0xff, ((dmanr&3)<<1) + IO_DMA1_BASE );
OUTB( (a>>8) & 0xff, ((dmanr&3)<<1) + IO_DMA1_BASE );
} else {
OUTB( (a>>1) & 0xff, ((dmanr&3)<<2) + IO_DMA2_BASE );
OUTB( (a>>9) & 0xff, ((dmanr&3)<<2) + IO_DMA2_BASE );
}
}
/*
* 设定DMA 传输块数
*/
static __inline__ void SetDmaCount(unsigned int dmanr, unsigned int count)
{
count--;
if (dmanr <= 3) {
OUTB( count & 0xff, ((dmanr&3)<<1) + 1 + IO_DMA1_BASE );
OUTB( (count>>8) & 0xff, ((dmanr&3)<<1) + 1 + IO_DMA1_BASE );
} else {
OUTB( (count>>1) & 0xff, ((dmanr&3)<<2) + 2 + IO_DMA2_BASE );
OUTB( (count>>9) & 0xff, ((dmanr&3)<<2) + 2 + IO_DMA2_BASE );
}
}
/*
* 获得DMA 传输剩余块数
*/
static __inline__ int GetDmaResidue(unsigned int dmanr)
{
unsigned int io_port = (dmanr<=3)? ((dmanr&3)<<1) + 1 + IO_DMA1_BASE
: ((dmanr&3)<<2) + 2 + IO_DMA2_BASE;
/* using short to get 16-bit wrap around */
unsigned short count;
count = 1 + inb(io_port);
count += inb(io_port) << 8;
return (dmanr<=3)? count : (count<<1);
}
#endif
bsp/x86/drivers/floppy.c 0 → 100644
浏览文件 @ f975ef51
#include <rtthread.h>
#include <rthw.h>
#include <bsp.h>
typedef rt_uint8_t u8;
typedef rt_uint16_t u16;
typedef rt_uint32_t u32;
typedef rt_int8_t s8;
typedef rt_int16_t s16;
typedef rt_int32_t s32;
#define OUTB(v,p) outb(p,v)
#include "floppy.h"
#include "dma.h"
#define NULL RT_NULL
#define SECTOR_SIZE 512
#define panic(str,...) do { rt_kprintf("panic::" str,##__VA_ARGS__); while(1); } while(0)
#define _local_irq_save(level) level = rt_hw_interrupt_disable()
#define _local_irq_restore(level) rt_hw_interrupt_enable(level)
static u8 floppy_buffer[512]; /* 软盘高速缓冲区地址指针 */
#define MAX_REPLIES 7
static u8 floppy_reply_buffer[MAX_REPLIES]; /* 软驱回应缓冲区 */
#define ST0 (floppy_reply_buffer[0]) /* 软驱回应0号字节 */
#define ST1 (floppy_reply_buffer[1]) /* 软驱回应1号字节 */
#define ST2 (floppy_reply_buffer[2]) /* 软驱回应2号字节 */
#define ST3 (floppy_reply_buffer[3]) /* 软驱回应3号字节 */
static char *floppy_inc_name; /* 软驱型号名 */
static char *floppy_type;
static u32 floppy_motor=0; /* 软驱马达状态字节 */
static u32 floppy_size =0;
/**********************功能函数***************************/
static void floppy_result(void); /* 获得软驱响应状态 */
static u32 floppy_sendbyte(u32); /* 向软驱控制寄存器发送一个控制字节 */
static u32 floppy_getbyte(void); /* 从软驱数据寄存器得到一个数据字节 */
static u32 floppy_get_info(void); /* 得到软驱信息 */
static void floppy_motorOn(void); /* 打开软驱马达 */
static void floppy_motorOff(void); /* 关闭软驱马达 */
static void floppy_setmode(void); /* 软驱模式设置 */
static void block_to_hts(u32, u32*, u32*, u32*); /* 逻辑块转为磁盘头、磁道号和扇区号 */
static void floppy_setupDMA(void); /* 设置软驱DMA通道 */
static void floppy_read_cmd(u32 blk); /* 从软盘上读取指定的逻辑块到缓冲区 */
void floppy_result(void)
{
u8 stat, i,count;
i=0;
for(count=0; count<0xFF; count++)
{
stat = inb( FD_STATUS ) & (STATUS_READY|STATUS_DIR|STATUS_BUSY); //读取状态寄存器
if (stat == STATUS_READY)
return;
if (stat == (STATUS_READY|STATUS_DIR|STATUS_BUSY))
{
if(i>7) break;
floppy_reply_buffer[i++]=inb_p(FD_DATA);
}
}
panic("Get floppy status times out !\n");
}
u32 floppy_sendbyte( u32 value )
{
u8 stat, i;
for ( i = 0; i < 128; i++ ) {
stat = inb( FD_STATUS ) & (STATUS_READY|STATUS_DIR); //读取状态寄存器
if ( stat == STATUS_READY )
{
OUTB( value ,FD_DATA); //将参数写入数据寄存器
return 1;
}
io_delay(); // 作一些延迟
}
return 0;
}
u32 floppy_getbyte(void)
{
u8 stat, i;
for ( i = 0; i < 128; i++ ) {
stat = inb( FD_STATUS ) & (STATUS_READY|STATUS_DIR|STATUS_BUSY); //读取状态寄存器
if (stat == STATUS_READY)
return -1;
if ( stat == 0xD0 )
return inb(FD_DATA);
io_delay();
}
return 0;
}
u32 floppy_get_info(void)
{
u32 i;
u8 CmType, FdType;
floppy_sendbyte(0x10);
i = floppy_getbyte();
switch (i)
{
case 0x80: floppy_inc_name = "NEC765A controller"; break;
case 0x90: floppy_inc_name = "NEC765B controller"; break;
default: floppy_inc_name = "Enhanced controller"; break;
}
CmType = readcmos(0x10); //read floppy type from cmos
FdType = (CmType>>4) & 0x07;
if ( FdType == 0 )
panic("Floppy driver not found!");
switch( FdType )
{
case 0x02: // 1.2MB
floppy_type = "1.2MB";
floppy_size = 2458*512;
break;
case 0x04: // 1.44MB 标准软盘
floppy_type = "1.44MB";
floppy_size = 2880*512;
break;
case 0x05: // 2.88MB
floppy_type = "2.88MB";
floppy_size = 2*2880*512;
break;
}
return 1;
}
void floppy_motorOn( void )
{
u32 eflags;
if (!floppy_motor)
{
_local_irq_save(eflags);
OUTB(28,FD_DOR);
floppy_motor = 1;
_local_irq_restore(eflags);
}
return;
}
void floppy_motorOff( void )
{
u32 eflags;
if (floppy_motor)
{
_local_irq_save(eflags);
OUTB(12,FD_DOR);
floppy_motor = 0;
_local_irq_restore(eflags);
}
return;
}
void floppy_setmode(void)
{
floppy_sendbyte (FD_SPECIFY);
floppy_sendbyte (0xcf);
floppy_sendbyte (0x06);
OUTB (0,FD_DCR);
}
void block_to_hts(u32 block, u32 *head, u32 *track, u32 *sector )
{
*head = ( block % ( 18 * 2 ) ) /18;
*track = block / ( 18 * 2 );
*sector = block % 18 + 1;
}
void floppy_setupDMA(void)
{
u32 eflags;
_local_irq_save(eflags);
DisableDma(2);
ClearDmaFF(2);
SetDmaMode(2,DMA_MODE_READ);
SetDmaAddr(2,(unsigned long)floppy_buffer);
SetDmaCount(2,512);
EnableDma(2);
_local_irq_restore(eflags);
}
void floppy_read_cmd(u32 blk)
{
u32 head;
u32 track;
u32 sector;
block_to_hts(blk,&head,&track,&sector);
floppy_motorOn();
io_delay();
floppy_setupDMA();
io_delay();
floppy_setmode();
io_delay();
floppy_sendbyte (FD_READ); //send read command
floppy_sendbyte (head*4 + 0);
floppy_sendbyte (track); /* Cylinder */
floppy_sendbyte (head); /* Head */
floppy_sendbyte (sector); /* Sector */
floppy_sendbyte (2); /* 0=128, 1=256, 2=512, 3=1024, ... */
floppy_sendbyte (18);
//floppy_sendbyte (sector+secs-1); /* Last sector in track:here are sectors count */
floppy_sendbyte (0x1B);
floppy_sendbyte (0xff);
return;
}
static struct rt_device devF;
static struct rt_mutex lock;
static struct rt_semaphore sem;
/* RT-Thread device interface */
static rt_err_t rt_floppy_init_internal(rt_device_t dev)
{
return RT_EOK;
}
static rt_err_t rt_floppy_open(rt_device_t dev, rt_uint16_t oflag)
{
return RT_EOK;
}
static rt_err_t rt_floppy_close(rt_device_t dev)
{
return RT_EOK;
}
/* position: block page address, not bytes address
* buffer:
* size : how many blocks
*/
static rt_size_t rt_floppy_read(rt_device_t device, rt_off_t position, void *buffer, rt_size_t size)
{
rt_size_t doSize = size;
rt_mutex_take(&lock, RT_WAITING_FOREVER);
while(size>0)
{
floppy_read_cmd(position);
rt_sem_take(&sem, RT_WAITING_FOREVER); /* waiting isr sem forever */
floppy_result();
io_delay();
if(ST1 != 0 || ST2 != 0)
{
panic("ST0 %d ST1 %d ST2 %d\n",ST0,ST1,ST2);
}
rt_memcpy(buffer, floppy_buffer, 512);
floppy_motorOff();
io_delay();
position += 1;
size -= 1;
}
rt_mutex_release(&lock);
return doSize;
}
/* position: block page address, not bytes address
* buffer:
* size : how many blocks
*/
static rt_size_t rt_floppy_write(rt_device_t device, rt_off_t position, const void *buffer, rt_size_t size)
{
rt_mutex_take(&lock, RT_WAITING_FOREVER);
panic("FIXME:I don't know how!\n");
rt_mutex_release(&lock);
return size;
}
static rt_err_t rt_floppy_control(rt_device_t dev, rt_uint8_t cmd, void *args)
{
RT_ASSERT(dev != RT_NULL);
if (cmd == RT_DEVICE_CTRL_BLK_GETGEOME)
{
struct rt_device_blk_geometry *geometry;
geometry = (struct rt_device_blk_geometry *)args;
if (geometry == RT_NULL) return -RT_ERROR;
geometry->bytes_per_sector = SECTOR_SIZE;
geometry->block_size = SECTOR_SIZE;
geometry->sector_count = floppy_size / SECTOR_SIZE;
}
return RT_EOK;
}
static void rt_floppy_isr(int vector, void* param)
{
(void)vector;
(void)param;
rt_sem_release(&sem);
}
void rt_floppy_init(void)
{
struct rt_device *device;
rt_mutex_init(&lock,"fdlock", RT_IPC_FLAG_FIFO);
rt_sem_init(&sem, "fdsem", 0, RT_IPC_FLAG_FIFO);
rt_hw_interrupt_install(FLOPPY_IRQ, rt_floppy_isr, RT_NULL, "floppy");
rt_hw_interrupt_umask(FLOPPY_IRQ);
floppy_get_info();
rt_kprintf("Floppy Inc : %s Floppy Type : %s\n",floppy_inc_name,floppy_type);
device = &(devF);
device->type = RT_Device_Class_Block;
device->init = rt_floppy_init_internal;
device->open = rt_floppy_open;
device->close = rt_floppy_close;
device->read = rt_floppy_read;
device->write = rt_floppy_write;
device->control = rt_floppy_control;
device->user_data = NULL;
rt_device_register(device, "floppy",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_REMOVABLE | RT_DEVICE_FLAG_STANDALONE);
}
bsp/x86/drivers/floppy.h 0 → 100644
浏览文件 @ f975ef51
#ifndef _FLOPPY_H
#define _FLOPPY_H
#define FD_STATUS 0x3f4 // 主状态寄存器端口。
#define FD_DATA 0x3f5 // 数据端口。
#define FD_DOR 0x3f2 // 数字输出寄存器（也称为数字控制寄存器）。
#define FD_DIR 0x3f7 // 数字输入寄存器。
#define FD_DCR 0x3f7 // 数据传输率控制寄存器。
/* 主状态寄存器各比特位的含义 */
#define STATUS_BUSYMASK 0x0F // 驱动器忙位（每位对应一个驱动器）。
#define STATUS_BUSY 0x10 // 软盘控制器忙。
#define STATUS_DMA 0x20 // 0 - 为DMA 数据传输模式，1 - 为非DMA 模式。
#define STATUS_DIR 0x40 // 传输方向：0 - CPU .. fdc，1 - 相反。
#define STATUS_READY 0x80 // 数据寄存器就绪位。
/*状态字节0（ST0）各比特位的含义 */
#define ST0_DS 0x03 // 驱动器选择号（发生中断时驱动器号）。
#define ST0_HA 0x04 // 磁头号。
#define ST0_NR 0x08 // 磁盘驱动器未准备好。
#define ST0_ECE 0x10 // 设备检测出错（零磁道校准出错）。
#define ST0_SE 0x20 // 寻道或重新校正操作执行结束。
#define ST0_INTR 0xC0 // 中断代码位（中断原因），00 - 命令正常结束；
// 01 - 命令异常结束；10 - 命令无效；11 - FDD 就绪状态改变。
/*状态字节1（ST1）各比特位的含义 */
#define ST1_MAM 0x01 // 未找到地址标志(ID AM)。
#define ST1_WP 0x02 // 写保护。
#define ST1_ND 0x04 // 未找到指定的扇区。
#define ST1_OR 0x10 // 数据传输超时（DMA 控制器故障）。
#define ST1_CRC 0x20 // CRC 检验出错。
#define ST1_EOC 0x80 // 访问超过一个磁道上的最大扇区号。
/*状态字节2（ST2）各比特位的含义 */
#define ST2_MAM 0x01 // 未找到数据地址标志。
#define ST2_BC 0x02 // 磁道坏。
#define ST2_SNS 0x04 // 检索（扫描）条件不满足。
#define ST2_SEH 0x08 // 检索条件满足。
#define ST2_WC 0x10 // 磁道（柱面）号不符。
#define ST2_CRC 0x20 // 数据场CRC 校验错。
#define ST2_CM 0x40 // 读数据遇到删除标志。
/*状态字节3（ST3）各比特位的含义 */
#define ST3_HA 0x04 // 磁头号。
#define ST3_TZ 0x10 // 零磁道信号。
#define ST3_WP 0x40 // 写保护。
/* 软盘命令码 */
#define FD_RECALIBRATE 0x07 // 重新校正(磁头退到零磁道)。
#define FD_SEEK 0x0F // 磁头寻道。
#define FD_READ 0xE6 // 读数据（MT 多磁道操作，MFM 格式，跳过删除数据）。
#define FD_WRITE 0xC5 // 写数据（MT，MFM）。
#define FD_SENSEI 0x08 // 检测中断状态。
#define FD_SPECIFY 0x03 // 设定驱动器参数（步进速率、磁头卸载时间等）。
/* DMA 命令 */
#define DMA_READ 0x46 // DMA 读盘，DMA 方式字（送DMA 端口12，11）。
#define DMA_WRITE 0x4A
extern void rt_floppy_init(void);
#endif
bsp/x86/drivers/include/bsp.h
浏览文件 @ f975ef51
......@@ -74,7 +74,16 @@ extern "C" {
#define INTTIMER0 0
#define INTKEYBOARD 1
#define INTUART0_RX 4
#define CLOCK_IRQ 0
#define KEYBOARD_IRQ 1
#define CASCADE_IRQ 2 /* cascade enable for 2nd AT controller */
#define ETHER_IRQ 3 /* default ethernet interrupt vector */
#define SECONDARY_IRQ 3 /* RS232 interrupt vector for port 2 */
#define RS232_IRQ 4 /* RS232 interrupt vector for port 1 */
#define XT_WINI_IRQ 5 /* xt winchester */
#define FLOPPY_IRQ 6 /* floppy disk */
#define PRINTER_IRQ 7
#define AT_WINI_IRQ 14 /* at winchester */
/* I/O Addresses of the two 8259A programmable interrupt controllers */
#define IO_PIC1 0x20 /* Master(IRQs 0-7) */
#define IO_PIC2 0xa0 /* Slave(IRQs 8-15) */
......
bsp/x86/drivers/include/i386.h
浏览文件 @ f975ef51
......@@ -11,6 +11,18 @@ static __inline unsigned char inb(int port)
__asm __volatile("inb %w1,%0" : "=a" (data) : "d" (port));
return data;
}
static __inline unsigned char inb_p(unsigned short port)
{
unsigned char _v;
__asm__ __volatile__ ("inb %1, %0\n\t"
// "outb %0,$0x80\n\t"
// "outb %0,$0x80\n\t"
// "outb %0,$0x80\n\t"
"outb %0,$0x80"
:"=a" (_v)
:"d" ((unsigned short) port));
return _v;
}
static __inline unsigned short inw(int port)
{
......@@ -39,11 +51,34 @@ static __inline void outb(int port, unsigned char data)
__asm __volatile("outb %0,%w1" : : "a" (data), "d" (port));
}
static __inline void outb_p(char value, unsigned short port)
{
__asm__ __volatile__ ("outb %0,%1\n\t"
"outb %0,$0x80"
::"a" ((char) value),"d" ((unsigned short) port));
}
static __inline void outw(int port, unsigned short data)
{
__asm __volatile("outw %0,%w1" : : "a" (data), "d" (port));
}
static __inline unsigned char readcmos(int reg)
{
outb(0x70,reg);
return (unsigned char) inb(0x71);
}
#define io_delay() \
__asm__ __volatile__ ("pushal \n\t"\
"mov $0x3F6, %dx \n\t" \
"inb %dx, %al \n\t" \
"inb %dx, %al \n\t" \
"inb %dx, %al \n\t" \
"inb %dx, %al \n\t" \
"popal")
/* Gate descriptors are slightly different*/
struct Gatedesc {
unsigned gd_off_15_0 : 16; // low 16 bits of offset in segment
......
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