From: acevest <zhaoyanbai@126.com>
Date: Sun, 14 Nov 2021 12:53:04 +0000 (+0800)
Subject: 将ATA操作pci command的bus master的代码移动到ata_dma_read_ext和硬盘中断函数里
X-Git-Url: http://zhaoyanbai.com/repos/Bv9ARM.ch05.html?a=commitdiff_plain;h=687f4faf87c2c55474e44e93887ee389edbdf0ae;p=kernel.git

将ATA操作pci command的bus master的代码移动到ata_dma_read_ext和硬盘中断函数里
---

diff --git a/drivers/ata.c b/drivers/ata.c
index eac1bdd..5ccdbbf 100644
--- a/drivers/ata.c
+++ b/drivers/ata.c
@@ -17,6 +17,10 @@ extern ide_pci_controller_t ide_pci_controller;
 void ata_dma_read_ext(int dev, uint64_t pos, uint16_t count, void *);
 
 void *mbr_buf;
+void ata_test(uint64_t nr) {
+    memset(mbr_buf, 0xAA, SECT_SIZE);
+    ata_dma_read_ext(0, nr, 1, mbr_buf);
+}
 
 // 本程序参考文档《AT Attachment with Packet Interface - 6》
 
@@ -45,8 +49,7 @@ void ata_read_identify(int dev) {  // 这里所用的dev是逻辑编号 ATA0、A
         }
     }
 
-    // u16 *identify = (u16 *)kmalloc(ATA_NSECTOR, 0);
-    insw(REG_DATA(dev), identify, 512 / sizeof(u16));
+    insw(REG_DATA(dev), identify, SECT_SIZE / sizeof(u16));
 
     // 第49个word的第8个bit位表示是否支持DMA
     // 第83个word的第10个bit位表示是否支持LBA48，为1表示支持。
@@ -66,9 +69,9 @@ void ata_read_identify(int dev) {  // 这里所用的dev是逻辑编号 ATA0、A
     printk("bus iobase %x cmd %x status %x prdt %x \n", ide_pci_controller.bus_iobase, ide_pci_controller.bus_cmd,
            ide_pci_controller.bus_status, ide_pci_controller.bus_prdt);
 
-    mbr_buf = kmalloc(512, 0);
-    memset(mbr_buf, 0xAA, 512);
-    ata_dma_read_ext(0, 0, 1, mbr_buf);
+    // TODO REMOVE
+    mbr_buf = kmalloc(SECT_SIZE, 0);
+    // ata_test(0);
 }
 
 // ATA_CMD_READ_DMA_EXT
@@ -79,7 +82,7 @@ void ata_dma_read_ext(int dev, uint64_t pos, uint16_t count, void *addr) {
     // 配置描述符表
     unsigned long paddr = va2pa(addr);
     ide_pci_controller.prdt[0].phys_addr = paddr;
-    ide_pci_controller.prdt[0].byte_count = 512;
+    ide_pci_controller.prdt[0].byte_count = SECT_SIZE;
     ide_pci_controller.prdt[0].reserved = 0;
     ide_pci_controller.prdt[0].eot = 1;
     outl(va2pa(ide_pci_controller.prdt), ide_pci_controller.bus_prdt);
@@ -115,6 +118,14 @@ void ata_dma_read_ext(int dev, uint64_t pos, uint16_t count, void *addr) {
 
     outb(ATA_CMD_READ_DMA_EXT, REG_CMD(dev));
 
+    // 这一句非常重要，如果不加这一句
+    // 在qemu中用DMA的方式读数据就会读不到数据，而只触是发中断，然后寄存器（Bus Master IDE Status
+    // Register）的值会一直是5 也就是INTERRUPT和和ACTIVE位是1，正常应该是4，也就是只有INTERRUPT位为1
+    // 在bochs中则加不加这一句不会有影响，都能正常读到数据
+    unsigned int v = pci_read_config_word(pci_cmd(ide_pci_controller.pci, PCI_COMMAND));
+    printk(" ide pci command %04x\n", v);
+    pci_write_config_word(v | PCI_COMMAND_MASTER, pci_cmd(ide_pci_controller.pci, PCI_COMMAND));
+
     // 指定DMA操作为读取硬盘操作，内核用DMA读取，对硬盘而言是写出
     // 并设置DMA的开始位，开始DMA
     outb(PCI_IDE_CMD_WRITE | PCI_IDE_CMD_START, ide_pci_controller.bus_cmd);
diff --git a/drivers/ata.h b/drivers/ata.h
index 45c05c0..904f3af 100644
--- a/drivers/ata.h
+++ b/drivers/ata.h
@@ -125,3 +125,5 @@ extern unsigned int ATA_CHL1_CTL_BASE;
 #define ATA_IDENT_MAX_LBA 120
 #define ATA_IDENT_COMMANDSETS 164
 #define ATA_IDENT_MAX_LBA_EXT 200
+
+#define SECT_SIZE 512
diff --git a/drivers/ide.c b/drivers/ide.c
index fed4c4b..b970f70 100644
--- a/drivers/ide.c
+++ b/drivers/ide.c
@@ -141,15 +141,6 @@ void ide_pci_init(pci_device_t *pci) {
     v = pci_read_config_word(pci_cmd(pci, PCI_COMMAND));
     printk(" ide pci command %04x\n", v);
 
-    // 这一句非常重要，如果不加这一句
-    // 在qemu中用DMA的方式读数据就会读不到数据，而只触是发中断，然后寄存器（Bus Master IDE Status
-    // Register）的值会一直是5 也就是INTERRUPT和和ACTIVE位是1，正常应该是4，也就是只有INTERRUPT位为1
-    // 在bochs中则加不加这一句不会有影响，都能正常读到数据
-    pci_write_config_word(v | PCI_COMMAND_MASTER, pci_cmd(pci, PCI_COMMAND));
-
-    v = pci_read_config_word(pci_cmd(pci, PCI_COMMAND));
-    printk(" ide pci command %04x\n", v);
-
     v = pci_read_config_byte(pci_cmd(pci, PCI_PROGIF));
     printk(" ide pci program interface %02x\n", v);
 
@@ -160,7 +151,6 @@ void ide_pci_init(pci_device_t *pci) {
     ide_pci_controller.bus_cmd = iobase + PCI_IDE_CMD;
     ide_pci_controller.bus_status = iobase + PCI_IDE_STATUS;
     ide_pci_controller.bus_prdt = iobase + PCI_IDE_PRDT;
-
     ide_pci_controller.prdt = (prdte_t *)alloc_one_page(0);
 
     int i;
@@ -177,6 +167,8 @@ void ide_pci_init(pci_device_t *pci) {
     ATA_CHL1_CMD_BASE = pci->bars[2] ? pci->bars[2] : ATA_CHL1_CMD_BASE;
     ATA_CHL1_CTL_BASE = pci->bars[3] ? pci->bars[3] : ATA_CHL1_CTL_BASE;
 
+    ide_pci_controller.pci = pci;
+
     printk("channel0: cmd %04x ctl %04x channel1: cmd %04x ctl %04x\n", ATA_CHL0_CMD_BASE, ATA_CHL0_CTL_BASE,
            ATA_CHL1_CMD_BASE, ATA_CHL1_CTL_BASE);
     // printl(18, "channel0: cmd %04x ctl %04x channel1: cmd %04x ctl %04x", HD_CHL0_CMD_BASE, HD_CHL0_CTL_BASE,
@@ -211,7 +203,6 @@ void init_pci_controller(unsigned int classcode) {
         // pci->classcode,
         // pci->intr_line);
         ide_pci_init(pci);
-        ide_pci_controller.pci = pci;
     }
 }
 void ide_default_intr() {}
diff --git a/drivers/ide.h b/drivers/ide.h
index 7c98511..cf09767 100644
--- a/drivers/ide.h
+++ b/drivers/ide.h
@@ -112,8 +112,6 @@
 // #define REG_CMD(dev) REG_CMD_BASE(dev, HD_CMD)
 // #define REG_CTL(dev) REG_CTL_BASE(dev, HD_CTL)
 
-// #define SECT_SIZE 512
-
 // #define hd_rd_data(dev, buf, count) hd_rd_port(REG_DATA(dev), buf, count)
 
 // #define hd_bsy(dev) ((inb(REG_STATUS(dev)) & HD_STATUS_BSY))
diff --git a/drivers/keyboard.c b/drivers/keyboard.c
index 56b368c..a7c4325 100644
--- a/drivers/keyboard.c
+++ b/drivers/keyboard.c
@@ -101,8 +101,11 @@ void kbd_debug(unsigned char scan_code) {
 
     // if (scan_code == 0x43)  // F9
     //     ide_dma_pci_lba48();
-    // if (scan_code == 0x44)  // F10
-    //     ide_debug();
+    if (scan_code == 0x44) {  // F10
+        void ata_test(uint64_t nr);
+        ata_test(0);
+    }
+
     if (scan_code == 0x57)  // F11
     {
         asm("cli;");
diff --git a/kernel/system.c b/kernel/system.c
index 72bfa16..d42e98f 100644
--- a/kernel/system.c
+++ b/kernel/system.c
@@ -92,12 +92,15 @@ void setup_gate() {
 void ide_irq();
 extern void *mbr_buf;
 uint8_t ata_pci_bus_status();
-
+extern ide_pci_controller_t ide_pci_controller;
 void default_ide_irq_handler(unsigned int irq, pt_regs_t *regs, void *dev_id) {
     printk("default irq handler %d \n", irq);
 
     printk("ide pci status after interrupt: %x", ata_pci_bus_status());
 
+    unsigned int v = pci_read_config_word(pci_cmd(ide_pci_controller.pci, PCI_COMMAND));
+    pci_write_config_word(v & (~PCI_COMMAND_MASTER), pci_cmd(ide_pci_controller.pci, PCI_COMMAND));
+
     uint16_t *p = (uint16_t *)mbr_buf;
     for (int i = 0; i < 256; i++) {
         if (i % 12 == 0) {