📄 ramdisk.c
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/****************************************Copyright (c)****************************************************
** Guangzhou ZHIYUAN electronics Co.,LTD.
**
** http://www.embedtools.com
**
**--------------File Info---------------------------------------------------------------------------------
** File name: ramdisk.c
** Latest modified Date: 2007-09-20
** Latest Version: 1.0
** Descriptions: 内存虚拟盘的大容量类存储器用户接口函数的实现
**
**--------------------------------------------------------------------------------------------------------
** Created by: Lizhenming
** Created date: 2007-09-9
** Version: 1.0
** Descriptions: The original version
**
*********************************************************************************************************/
#include "msdevincludes.h"
/*********************************************************************************************************
Disk define
*********************************************************************************************************/
static __uint32 __GuiCurrentLBA; /* 当前逻辑块地址 */
static __uint32 __GuiXferSectorCnt; /* 要传输的逻辑块数 */
static __uint8 __GucDiskStatus = __MS_NOT_READY; /* 存储器状态 */
static __uint8 const __GucRamDiskFirstSec[512] = {
0xEB,0x3C,0x90,0x4D,0x53,0x44,0x4F,0x53,0x35,0x2E,0x30,0x00,0x02,0x08,0x08,0x00,
0x02,0x00,0x02,0x00,0x50,0xF8,0x08,0x00,0x3F,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x29,0x9A,0x80,0x72,0x6C,0x4E,0x4F,0x20,0x4E,0x41,
0x4D,0x45,0x20,0x20,0x20,0x20,0x46,0x41,0x54,0x31,0x32,0x20,0x20,0x20,0x33,0xC9,
0x8E,0xD1,0xBC,0xF0,0x7B,0x8E,0xD9,0xB8,0x00,0x20,0x8E,0xC0,0xFC,0xBD,0x00,0x7C,
0x38,0x4E,0x24,0x7D,0x24,0x8B,0xC1,0x99,0xE8,0x3C,0x01,0x72,0x1C,0x83,0xEB,0x3A,
0x66,0xA1,0x1C,0x7C,0x26,0x66,0x3B,0x07,0x26,0x8A,0x57,0xFC,0x75,0x06,0x80,0xCA,
0x02,0x88,0x56,0x02,0x80,0xC3,0x10,0x73,0xEB,0x33,0xC9,0x8A,0x46,0x10,0x98,0xF7,
0x66,0x16,0x03,0x46,0x1C,0x13,0x56,0x1E,0x03,0x46,0x0E,0x13,0xD1,0x8B,0x76,0x11,
0x60,0x89,0x46,0xFC,0x89,0x56,0xFE,0xB8,0x20,0x00,0xF7,0xE6,0x8B,0x5E,0x0B,0x03,
0xC3,0x48,0xF7,0xF3,0x01,0x46,0xFC,0x11,0x4E,0xFE,0x61,0xBF,0x00,0x00,0xE8,0xE6,
0x00,0x72,0x39,0x26,0x38,0x2D,0x74,0x17,0x60,0xB1,0x0B,0xBE,0xA1,0x7D,0xF3,0xA6,
0x61,0x74,0x32,0x4E,0x74,0x09,0x83,0xC7,0x20,0x3B,0xFB,0x72,0xE6,0xEB,0xDC,0xA0,
0xFB,0x7D,0xB4,0x7D,0x8B,0xF0,0xAC,0x98,0x40,0x74,0x0C,0x48,0x74,0x13,0xB4,0x0E,
0xBB,0x07,0x00,0xCD,0x10,0xEB,0xEF,0xA0,0xFD,0x7D,0xEB,0xE6,0xA0,0xFC,0x7D,0xEB,
0xE1,0xCD,0x16,0xCD,0x19,0x26,0x8B,0x55,0x1A,0x52,0xB0,0x01,0xBB,0x00,0x00,0xE8,
0x3B,0x00,0x72,0xE8,0x5B,0x8A,0x56,0x24,0xBE,0x0B,0x7C,0x8B,0xFC,0xC7,0x46,0xF0,
0x3D,0x7D,0xC7,0x46,0xF4,0x29,0x7D,0x8C,0xD9,0x89,0x4E,0xF2,0x89,0x4E,0xF6,0xC6,
0x06,0x96,0x7D,0xCB,0xEA,0x03,0x00,0x00,0x20,0x0F,0xB6,0xC8,0x66,0x8B,0x46,0xF8,
0x66,0x03,0x46,0x1C,0x66,0x8B,0xD0,0x66,0xC1,0xEA,0x10,0xEB,0x5E,0x0F,0xB6,0xC8,
0x4A,0x4A,0x8A,0x46,0x0D,0x32,0xE4,0xF7,0xE2,0x03,0x46,0xFC,0x13,0x56,0xFE,0xEB,
0x4A,0x52,0x50,0x06,0x53,0x6A,0x01,0x6A,0x10,0x91,0x8B,0x46,0x18,0x96,0x92,0x33,
0xD2,0xF7,0xF6,0x91,0xF7,0xF6,0x42,0x87,0xCA,0xF7,0x76,0x1A,0x8A,0xF2,0x8A,0xE8,
0xC0,0xCC,0x02,0x0A,0xCC,0xB8,0x01,0x02,0x80,0x7E,0x02,0x0E,0x75,0x04,0xB4,0x42,
0x8B,0xF4,0x8A,0x56,0x24,0xCD,0x13,0x61,0x61,0x72,0x0B,0x40,0x75,0x01,0x42,0x03,
0x5E,0x0B,0x49,0x75,0x06,0xF8,0xC3,0x41,0xBB,0x00,0x00,0x60,0x66,0x6A,0x00,0xEB,
0xB0,0x4E,0x54,0x4C,0x44,0x52,0x20,0x20,0x20,0x20,0x20,0x20,0x0D,0x0A,0x52,0x65,
0x6D,0x6F,0x76,0x65,0x20,0x64,0x69,0x73,0x6B,0x73,0x20,0x6F,0x72,0x20,0x6F,0x74,
0x68,0x65,0x72,0x20,0x6D,0x65,0x64,0x69,0x61,0x2E,0xFF,0x0D,0x0A,0x44,0x69,0x73,
0x6B,0x20,0x65,0x72,0x72,0x6F,0x72,0xFF,0x0D,0x0A,0x50,0x72,0x65,0x73,0x73,0x20,
0x61,0x6E,0x79,0x20,0x6B,0x65,0x79,0x20,0x74,0x6F,0x20,0x72,0x65,0x73,0x74,0x61,
0x72,0x74,0x0D,0x0A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xAC,0xCB,0xD8,0x55,0xAA
};
static __DISK_INFO __GramdiskInfo = {
SECTOR_CAPACITY,
SECTOR_SIZE
};
/*********************************************************************************************************
** Function name: ramdiskFormat
**
** Descriptions: 格式化存储器
**
** input parameters: 无
** output parameters: 无
** Returned value: 无
**
*********************************************************************************************************/
void ramdiskFormat (void)
{
__uint32 i;
OS_ENTER_CRITICAL();
for (i = 0; i < 512; i++) {
__GucRamDiskSpace[i] = __GucRamDiskFirstSec[i];
}
for (i = 512; i < 512 * 2 * 64; i++) {
__GucRamDiskSpace[i] = 0;
}
OS_EXIT_CRITICAL();
}
/*********************************************************************************************************
** Function name: ramdiskInit
**
** Descriptions: 初始化存储器
**
** input parameters: 无
** output parameters: 无
** Returned value: __MASS_SUCCESS 初始化成功
** __MASS_FAIL 初始化失败
**
*********************************************************************************************************/
__uint8 ramdiskInit (void)
{
massResetSoft();
__GucDiskStatus = __MS_READY;
return __MASS_SUCCESS;
}
/*********************************************************************************************************
** Function name: ramdiskReset
**
** Descriptions: 复位存储器
**
** input parameters: 无
** output parameters: 无
** Returned value: __MASS_SUCCESS 复位成功
** __MASS_FAIL 复位失败
**
*********************************************************************************************************/
__uint8 ramdiskReset (void)
{
__GucDiskStatus = __MS_READY;
return __MASS_SUCCESS;
}
/*********************************************************************************************************
** Function name: ramdiskGetInfo
**
** Descriptions: 获取存储器容量，扇区大小信息
**
** input parameters: 无
** output parameters: 无
** Returned value: 存储器容量(扇区数)，扇区大小信息
**
*********************************************************************************************************/
__PDISK_INFO ramdiskGetInfo (void)
{
return &__GramdiskInfo;
}
/*********************************************************************************************************
** Function name: ramdiskGetStatus
**
** Descriptions: 获取存储器状态
**
** input parameters: 无
** output parameters: 无
** Returned value: __MS_READY -- 存储器准备好
** __MS_NOT_READY -- 存储器未准备好
*********************************************************************************************************/
__uint8 ramdiskGetStatus (void)
{
return __GucDiskStatus;
}
/*********************************************************************************************************
** Function name: ramdiskReadSetting
**
** Descriptions: 读存储器之前的设置
**
** input parameters: LBA 逻辑块地址
** uiXferCnt 总共要传输的扇区数
** output parameters: 无
** Returned value: __MASS_SUCCESS 操作成功
** __MASS_FAIL 操作失败
**
*********************************************************************************************************/
__uint8 ramdiskReadSetting (__uint32 uiLBA, __uint32 uiXferCnt)
{
__GuiCurrentLBA = uiLBA;
__GuiXferSectorCnt = uiXferCnt;
__GpucMassStorageBuf = &__GucRamDiskSpace[__GuiCurrentLBA*SECTOR_SIZE];
return __MASS_SUCCESS;
}
/*********************************************************************************************************
** Function name: ramdiskWriteSetting
**
** Descriptions: 写存储器之前的设置
**
** input parameters: LBA 逻辑块地址
** uiXferCnt 总共要传输的扇区数
** output parameters: 无
** Returned value: __MASS_SUCCESS 操作成功
** __MASS_FAIL 操作失败
**
*********************************************************************************************************/
__uint8 ramdiskWriteSetting (__uint32 uiLBA, __uint32 uiXferCnt)
{
__GuiCurrentLBA = uiLBA;
__GuiXferSectorCnt = uiXferCnt;
__GpucMassStorageBuf = &__GucRamDiskSpace[__GuiCurrentLBA*SECTOR_SIZE];
return __MASS_SUCCESS;
}
/*********************************************************************************************************
** Function name: ramdiskRead
**
** Descriptions: 读取存储器数据到缓冲区
**
** input parameters: 无
** output parameters: 无
** Returned value: __MASS_SUCCESS 操作成功
** __MASS_FAIL 操作失败
**
*********************************************************************************************************/
__uint8 ramdiskRead (__uint32 uiLBA, __uint8 *pucData)
{
__GpucMassStorageBuf = &__GucRamDiskSpace[__GuiCurrentLBA*SECTOR_SIZE];
__GuiCurrentLBA++;
__GuiXferSectorCnt--;
return __MASS_SUCCESS;
}
/*********************************************************************************************************
** Function name: ramdiskWrite
**
** Descriptions: 把存储器缓冲区数据写回存储器
**
** input parameters: 无
** output parameters: 无
** Returned value: __MASS_SUCCESS 操作成功
** __MASS_FAIL 操作失败
**
*********************************************************************************************************/
__uint8 ramdiskWrite (__uint32 uiLBA, __uint8 *pucData)
{
__GuiCurrentLBA++;
__GuiXferSectorCnt--;
__GpucMassStorageBuf = &__GucRamDiskSpace[__GuiCurrentLBA*SECTOR_SIZE];
return __MASS_SUCCESS;
}
/*********************************************************************************************************
END FILE
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