static void test_vm_unmap(void)
{
paddr_t paddr;
vaddr_t vaddr;
vm_as_t* as;
as = vm_get_kernel_as();
serial_printl("[?] test unmap\n");
vaddr = (vaddr_t)0xb0000000;
paddr = phys_alloc();
vm_map(as, vaddr, paddr);
/* no page fault
*/
*(uint32_t*)vaddr = 0x2a;
vm_unmap(as, vaddr);
phys_free(paddr);
/* page fault
*/
*(uint32_t*)vaddr = 0x2a;
}
static void test_vm_map(void)
{
paddr_t paddr;
vaddr_t vaddr;
vm_as_t* as;
as = vm_get_kernel_as();
vaddr = (vaddr_t)0xb0000000;
paddr = phys_alloc();
vm_map(as, vaddr + PHYS_FRAME_SIZE * 0, paddr);
*(volatile uint32_t*)(vaddr + PHYS_FRAME_SIZE * 0) = 0x2a;
serial_printl("[?] --> %x\n",
*(volatile uint32_t*)(vaddr + PHYS_FRAME_SIZE * 0));
vm_map(as, vaddr + PHYS_FRAME_SIZE * 1, paddr);
*(volatile uint32_t*)(vaddr + PHYS_FRAME_SIZE * 1) = 0x2a;
serial_printl("[?] --> %x\n",
*(volatile uint32_t*)(vaddr + PHYS_FRAME_SIZE * 1));
vm_map(as, vaddr + PHYS_FRAME_SIZE * 2, paddr);
*(volatile uint32_t*)(vaddr + PHYS_FRAME_SIZE * 2) = 0x2a;
serial_printl("[?] --> %x\n",
*(volatile uint32_t*)(vaddr + PHYS_FRAME_SIZE * 2));
phys_free(paddr);
}
/* alloc a block */
void *
mm_alloc(size_t size)
{
unsigned bnum = (unsigned) ((size + 1) / (PHYS_PAGE_SIZE * 1024)) + 1;
// / PHYS_PAGE_SIZE + 1;
return (void *)phys_alloc(bnum);
}
void phys_test(void)
{
paddr_t a;
paddr_t b;
paddr_t c;
serial_printl("[?] test\n");
phys_debug();
a = phys_alloc();
serial_printl("%x\n", (uint32_t)a);
phys_free(a);
a = phys_alloc();
serial_printl("%x\n", (uint32_t)a);
phys_free(a);
phys_debug();
a = phys_alloc();
serial_printl("%x\n", (uint32_t)a);
b = phys_alloc();
serial_printl("%x\n", (uint32_t)b);
c = phys_alloc();
serial_printl("%x\n", (uint32_t)c);
phys_debug();
phys_free(a);
phys_free(b);
phys_free(c);
phys_debug();
b = phys_alloc_range(101);
serial_printl("b == %x\n", (uint32_t)b);
phys_free_range(b, 101);
phys_debug();
phys_debug();
}
static void test_page_fault(void)
{
volatile uint32_t* vaddr_0 = (uint32_t*)0xb0000000;
volatile uint32_t* vaddr_1 = (uint32_t*)0xb0001000;
volatile uint32_t* vaddr_2 = (uint32_t*)0xb0002000;
paddr_t paddr = phys_alloc();
vm_as_t* as;
as = vm_get_kernel_as();
vm_map(as, (vaddr_t)vaddr_0, paddr);
vm_map(as, (vaddr_t)vaddr_1, paddr);
vm_map(as, (vaddr_t)vaddr_2, paddr);
*vaddr_0 = 0x2a;
if ((*vaddr_0 != 0x2a) ||
(*vaddr_0 != *vaddr_1) ||
(*vaddr_0 != *vaddr_2))
BUG();
}
/** Register a new PCI ATA channel.
* @param pci_device PCI device the channel is on.
* @param idx Channel index.
* @param ctrl_base Control registers base address.
* @param cmd_base Command registers base address.
* @param bm_base Bus master base address.
* @param irq IRQ number.
* @return Pointer to ATA channel structure if present. */
static ata_channel_t *pci_ata_channel_add(pci_device_t *pci_device, int idx, uint32_t ctrl_base,
uint32_t cmd_base, uint32_t bm_base, uint32_t irq) {
uint16_t pci_cmd_old, pci_cmd_new;
pci_ata_channel_t *channel;
bool dma = true;
status_t ret;
/* Configure the PCI device appropriately. */
pci_cmd_old = pci_cmd_new = pci_config_read16(pci_device, PCI_CONFIG_COMMAND);
pci_cmd_new &= ~PCI_COMMAND_INT_DISABLE;
pci_cmd_new |= (PCI_COMMAND_IO | PCI_COMMAND_BUS_MASTER);
if(pci_cmd_new != pci_cmd_old) {
pci_config_write16(pci_device, PCI_CONFIG_COMMAND, pci_cmd_new);
kprintf(LOG_DEBUG, "ata: reconfigured PCI device %d:%02x.%d (old: 0x%04x, new: 0x%04x)\n",
pci_device->bus, pci_device->device, pci_device->function,
pci_cmd_old, pci_cmd_new);
}
/* Check presence by writing a value to the low LBA port on the channel,
* then reading it back. If the value is the same, it is present. */
out8(cmd_base + ATA_CMD_REG_LBA_LOW, 0xAB);
if(in8(cmd_base + ATA_CMD_REG_LBA_LOW) != 0xAB) {
if(pci_cmd_new != pci_cmd_old) {
pci_config_write16(pci_device, PCI_CONFIG_COMMAND, pci_cmd_old);
}
return NULL;
}
/* Allocate our information structure. */
channel = kmalloc(sizeof(*channel), MM_WAIT);
channel->channel = NULL;
channel->pci_device = pci_device;
channel->ctrl_base = ctrl_base;
channel->cmd_base = cmd_base;
channel->bus_master_base = bm_base + (idx * 8);
channel->irq = irq;
channel->prdt = NULL;
/* If the bus master is in simplex mode, disable DMA on the second
* channel. According to the Haiku code, Intel controllers use this for
* something other than simplex mode. */
if(pci_device->vendor_id != 0x8086) {
if(in8(bm_base + PCI_ATA_BM_REG_STATUS) & PCI_ATA_BM_STATUS_SIMPLEX && idx > 1) {
dma = false;
}
}
/* Allocate a PRDT if necessary. */
if(dma) {
phys_alloc(PRDT_SIZE, 0, 0, 0, (phys_ptr_t)0x100000000, MM_WAIT, &channel->prdt_phys);
channel->prdt = phys_map(channel->prdt_phys, PRDT_SIZE, MM_WAIT);
}
/* Register the IRQ handler. */
ret = irq_register(channel->irq, pci_ata_irq_handler, NULL, channel);
if(ret != STATUS_SUCCESS) {
kprintf(LOG_WARN, "ata: failed to register PCI ATA IRQ handler %u\n", channel->irq);
if(dma) {
phys_unmap(channel->prdt, PRDT_SIZE, true);
phys_free(channel->prdt_phys, PRDT_SIZE);
}
kfree(channel);
return NULL;
}
/* Try to register the ATA channel. */
channel->channel = ata_sff_channel_add(pci_device->node, idx, &pci_ata_channel_ops, channel,
dma, PRDT_ENTRIES, (phys_ptr_t)0x100000000);
if(!channel->channel) {
irq_unregister(channel->irq, pci_ata_irq_handler, NULL, channel);
if(dma) {
phys_unmap(channel->prdt, PRDT_SIZE, true);
phys_free(channel->prdt_phys, PRDT_SIZE);
}
kfree(channel);
return NULL;
}
return channel->channel;
}