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pci: add W1C bits to pci status register 

This patch adds W1C bit support in the initialization/reset of pci
status registers.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
master
Isaku Yamahata 2010-11-16 17:26:07 +09:00 committed by Michael S. Tsirkin
parent e927d48722
commit 89d437df5e
1 changed files with 16 additions and 0 deletions
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16
hw/pci.c
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@ -143,6 +143,9 @@ static void pci_device_reset(PCIDevice *dev)
pci_word_test_and_clear_mask(dev->config + PCI_COMMAND,
pci_get_word(dev->wmask + PCI_COMMAND) |
pci_get_word(dev->w1cmask + PCI_COMMAND));
pci_word_test_and_clear_mask(dev->config + PCI_STATUS,
pci_get_word(dev->wmask + PCI_STATUS) |
pci_get_word(dev->w1cmask + PCI_STATUS));
dev->config[PCI_CACHE_LINE_SIZE] = 0x0;
dev->config[PCI_INTERRUPT_LINE] = 0x0;
for (r = 0; r < PCI_NUM_REGIONS; ++r) {
@ -552,6 +555,18 @@ static void pci_init_wmask(PCIDevice *dev)
config_size - PCI_CONFIG_HEADER_SIZE);
}
static void pci_init_w1cmask(PCIDevice *dev)
{
/*
* Note: It's okay to set w1mask even for readonly bits as
* long as their value is hardwired to 0.
*/
pci_set_word(dev->w1cmask + PCI_STATUS,
PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT |
PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT |
PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY);
}
static void pci_init_wmask_bridge(PCIDevice *d)
{
/* PCI_PRIMARY_BUS, PCI_SECONDARY_BUS, PCI_SUBORDINATE_BUS and
@ -676,6 +691,7 @@ static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus,
}
pci_init_cmask(pci_dev);
pci_init_wmask(pci_dev);
pci_init_w1cmask(pci_dev);
if (is_bridge) {
pci_init_wmask_bridge(pci_dev);
}