e23a1b33b5
Like qdev_init(), but terminate program via hw_error() instead of returning an error value. Use it instead of qdev_init() where terminating the program on failure is okay, either because it's during machine construction, or because we know that failure can't happen. Because relying in the latter is somewhat unclean, and the former is not always obvious, it would be nice to go back to qdev_init() in the not-so-obvious cases, only with proper error handling. I'm leaving that for another day, because it involves making sure that error values are properly checked by all callers. Patchworks-ID: 35168 Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
381 lines
11 KiB
C
381 lines
11 KiB
C
/*
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* QEMU i440FX/PIIX3 PCI Bridge Emulation
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*
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* Copyright (c) 2006 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw.h"
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#include "pc.h"
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#include "pci.h"
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#include "isa.h"
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#include "sysbus.h"
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typedef uint32_t pci_addr_t;
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#include "pci_host.h"
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typedef PCIHostState I440FXState;
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typedef struct PIIX3State {
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PCIDevice dev;
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int pci_irq_levels[4];
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qemu_irq *pic;
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} PIIX3State;
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struct PCII440FXState {
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PCIDevice dev;
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target_phys_addr_t isa_page_descs[384 / 4];
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uint8_t smm_enabled;
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PIIX3State *piix3;
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};
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static void i440fx_addr_writel(void* opaque, uint32_t addr, uint32_t val)
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{
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I440FXState *s = opaque;
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s->config_reg = val;
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}
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static uint32_t i440fx_addr_readl(void* opaque, uint32_t addr)
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{
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I440FXState *s = opaque;
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return s->config_reg;
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}
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static void piix3_set_irq(void *opaque, int irq_num, int level);
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/* return the global irq number corresponding to a given device irq
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pin. We could also use the bus number to have a more precise
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mapping. */
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static int pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num)
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{
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int slot_addend;
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slot_addend = (pci_dev->devfn >> 3) - 1;
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return (irq_num + slot_addend) & 3;
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}
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static void update_pam(PCII440FXState *d, uint32_t start, uint32_t end, int r)
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{
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uint32_t addr;
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// printf("ISA mapping %08x-0x%08x: %d\n", start, end, r);
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switch(r) {
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case 3:
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/* RAM */
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cpu_register_physical_memory(start, end - start,
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start);
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break;
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case 1:
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/* ROM (XXX: not quite correct) */
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cpu_register_physical_memory(start, end - start,
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start | IO_MEM_ROM);
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break;
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case 2:
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case 0:
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/* XXX: should distinguish read/write cases */
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for(addr = start; addr < end; addr += 4096) {
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cpu_register_physical_memory(addr, 4096,
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d->isa_page_descs[(addr - 0xa0000) >> 12]);
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}
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break;
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}
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}
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static void i440fx_update_memory_mappings(PCII440FXState *d)
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{
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int i, r;
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uint32_t smram, addr;
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update_pam(d, 0xf0000, 0x100000, (d->dev.config[0x59] >> 4) & 3);
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for(i = 0; i < 12; i++) {
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r = (d->dev.config[(i >> 1) + 0x5a] >> ((i & 1) * 4)) & 3;
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update_pam(d, 0xc0000 + 0x4000 * i, 0xc0000 + 0x4000 * (i + 1), r);
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}
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smram = d->dev.config[0x72];
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if ((d->smm_enabled && (smram & 0x08)) || (smram & 0x40)) {
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cpu_register_physical_memory(0xa0000, 0x20000, 0xa0000);
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} else {
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for(addr = 0xa0000; addr < 0xc0000; addr += 4096) {
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cpu_register_physical_memory(addr, 4096,
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d->isa_page_descs[(addr - 0xa0000) >> 12]);
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}
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}
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}
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void i440fx_set_smm(PCII440FXState *d, int val)
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{
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val = (val != 0);
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if (d->smm_enabled != val) {
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d->smm_enabled = val;
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i440fx_update_memory_mappings(d);
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}
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}
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/* XXX: suppress when better memory API. We make the assumption that
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no device (in particular the VGA) changes the memory mappings in
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the 0xa0000-0x100000 range */
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void i440fx_init_memory_mappings(PCII440FXState *d)
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{
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int i;
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for(i = 0; i < 96; i++) {
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d->isa_page_descs[i] = cpu_get_physical_page_desc(0xa0000 + i * 0x1000);
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}
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}
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static void i440fx_write_config(PCIDevice *dev,
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uint32_t address, uint32_t val, int len)
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{
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PCII440FXState *d = DO_UPCAST(PCII440FXState, dev, dev);
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/* XXX: implement SMRAM.D_LOCK */
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pci_default_write_config(dev, address, val, len);
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if ((address >= 0x59 && address <= 0x5f) || address == 0x72)
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i440fx_update_memory_mappings(d);
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}
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static int i440fx_load_old(QEMUFile* f, void *opaque, int version_id)
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{
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PCII440FXState *d = opaque;
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int ret, i;
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ret = pci_device_load(&d->dev, f);
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if (ret < 0)
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return ret;
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i440fx_update_memory_mappings(d);
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qemu_get_8s(f, &d->smm_enabled);
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if (version_id == 2)
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for (i = 0; i < 4; i++)
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d->piix3->pci_irq_levels[i] = qemu_get_be32(f);
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return 0;
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}
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static int i440fx_post_load(void *opaque, int version_id)
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{
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PCII440FXState *d = opaque;
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i440fx_update_memory_mappings(d);
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return 0;
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}
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static const VMStateDescription vmstate_i440fx = {
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.name = "I440FX",
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.version_id = 3,
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.minimum_version_id = 3,
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.minimum_version_id_old = 1,
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.load_state_old = i440fx_load_old,
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.post_load = i440fx_post_load,
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.fields = (VMStateField []) {
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VMSTATE_PCI_DEVICE(dev, PCII440FXState),
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VMSTATE_UINT8(smm_enabled, PCII440FXState),
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VMSTATE_END_OF_LIST()
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}
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};
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static int i440fx_pcihost_initfn(SysBusDevice *dev)
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{
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I440FXState *s = FROM_SYSBUS(I440FXState, dev);
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register_ioport_write(0xcf8, 4, 4, i440fx_addr_writel, s);
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register_ioport_read(0xcf8, 4, 4, i440fx_addr_readl, s);
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register_ioport_write(0xcfc, 4, 1, pci_host_data_writeb, s);
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register_ioport_write(0xcfc, 4, 2, pci_host_data_writew, s);
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register_ioport_write(0xcfc, 4, 4, pci_host_data_writel, s);
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register_ioport_read(0xcfc, 4, 1, pci_host_data_readb, s);
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register_ioport_read(0xcfc, 4, 2, pci_host_data_readw, s);
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register_ioport_read(0xcfc, 4, 4, pci_host_data_readl, s);
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return 0;
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}
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static int i440fx_initfn(PCIDevice *dev)
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{
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PCII440FXState *d = DO_UPCAST(PCII440FXState, dev, dev);
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pci_config_set_vendor_id(d->dev.config, PCI_VENDOR_ID_INTEL);
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pci_config_set_device_id(d->dev.config, PCI_DEVICE_ID_INTEL_82441);
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d->dev.config[0x08] = 0x02; // revision
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pci_config_set_class(d->dev.config, PCI_CLASS_BRIDGE_HOST);
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d->dev.config[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL; // header_type
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d->dev.config[0x72] = 0x02; /* SMRAM */
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vmstate_register(0, &vmstate_i440fx, d);
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return 0;
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}
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PCIBus *i440fx_init(PCII440FXState **pi440fx_state, int *piix3_devfn, qemu_irq *pic)
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{
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DeviceState *dev;
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PCIBus *b;
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PCIDevice *d;
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I440FXState *s;
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PIIX3State *piix3;
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dev = qdev_create(NULL, "i440FX-pcihost");
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s = FROM_SYSBUS(I440FXState, sysbus_from_qdev(dev));
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b = pci_bus_new(&s->busdev.qdev, NULL, 0);
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s->bus = b;
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qdev_init_nofail(dev);
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d = pci_create_simple(b, 0, "i440FX");
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*pi440fx_state = DO_UPCAST(PCII440FXState, dev, d);
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piix3 = DO_UPCAST(PIIX3State, dev,
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pci_create_simple(b, -1, "PIIX3"));
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piix3->pic = pic;
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pci_bus_irqs(b, piix3_set_irq, pci_slot_get_pirq, piix3, 4);
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(*pi440fx_state)->piix3 = piix3;
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*piix3_devfn = piix3->dev.devfn;
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return b;
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}
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/* PIIX3 PCI to ISA bridge */
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static void piix3_set_irq(void *opaque, int irq_num, int level)
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{
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int i, pic_irq, pic_level;
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PIIX3State *piix3 = opaque;
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piix3->pci_irq_levels[irq_num] = level;
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/* now we change the pic irq level according to the piix irq mappings */
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/* XXX: optimize */
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pic_irq = piix3->dev.config[0x60 + irq_num];
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if (pic_irq < 16) {
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/* The pic level is the logical OR of all the PCI irqs mapped
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to it */
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pic_level = 0;
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for (i = 0; i < 4; i++) {
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if (pic_irq == piix3->dev.config[0x60 + i])
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pic_level |= piix3->pci_irq_levels[i];
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}
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qemu_set_irq(piix3->pic[pic_irq], pic_level);
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}
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}
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static void piix3_reset(void *opaque)
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{
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PIIX3State *d = opaque;
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uint8_t *pci_conf = d->dev.config;
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pci_conf[0x04] = 0x07; // master, memory and I/O
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pci_conf[0x05] = 0x00;
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pci_conf[0x06] = 0x00;
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pci_conf[0x07] = 0x02; // PCI_status_devsel_medium
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pci_conf[0x4c] = 0x4d;
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pci_conf[0x4e] = 0x03;
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pci_conf[0x4f] = 0x00;
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pci_conf[0x60] = 0x80;
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pci_conf[0x61] = 0x80;
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pci_conf[0x62] = 0x80;
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pci_conf[0x63] = 0x80;
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pci_conf[0x69] = 0x02;
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pci_conf[0x70] = 0x80;
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pci_conf[0x76] = 0x0c;
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pci_conf[0x77] = 0x0c;
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pci_conf[0x78] = 0x02;
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pci_conf[0x79] = 0x00;
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pci_conf[0x80] = 0x00;
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pci_conf[0x82] = 0x00;
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pci_conf[0xa0] = 0x08;
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pci_conf[0xa2] = 0x00;
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pci_conf[0xa3] = 0x00;
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pci_conf[0xa4] = 0x00;
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pci_conf[0xa5] = 0x00;
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pci_conf[0xa6] = 0x00;
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pci_conf[0xa7] = 0x00;
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pci_conf[0xa8] = 0x0f;
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pci_conf[0xaa] = 0x00;
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pci_conf[0xab] = 0x00;
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pci_conf[0xac] = 0x00;
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pci_conf[0xae] = 0x00;
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memset(d->pci_irq_levels, 0, sizeof(d->pci_irq_levels));
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}
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static const VMStateDescription vmstate_piix3 = {
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.name = "PIIX3",
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.version_id = 3,
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.minimum_version_id = 2,
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.minimum_version_id_old = 2,
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.fields = (VMStateField []) {
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VMSTATE_PCI_DEVICE(dev, PIIX3State),
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VMSTATE_INT32_ARRAY_V(pci_irq_levels, PIIX3State, 4, 3),
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VMSTATE_END_OF_LIST()
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}
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};
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static int piix3_initfn(PCIDevice *dev)
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{
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PIIX3State *d = DO_UPCAST(PIIX3State, dev, dev);
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uint8_t *pci_conf;
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isa_bus_new(&d->dev.qdev);
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vmstate_register(0, &vmstate_piix3, d);
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pci_conf = d->dev.config;
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pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_INTEL);
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pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_INTEL_82371SB_0); // 82371SB PIIX3 PCI-to-ISA bridge (Step A1)
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pci_config_set_class(pci_conf, PCI_CLASS_BRIDGE_ISA);
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pci_conf[PCI_HEADER_TYPE] =
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PCI_HEADER_TYPE_NORMAL | PCI_HEADER_TYPE_MULTI_FUNCTION; // header_type = PCI_multifunction, generic
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piix3_reset(d);
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qemu_register_reset(piix3_reset, d);
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return 0;
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}
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static PCIDeviceInfo i440fx_info[] = {
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{
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.qdev.name = "i440FX",
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.qdev.desc = "Host bridge",
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.qdev.size = sizeof(PCII440FXState),
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.qdev.no_user = 1,
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.init = i440fx_initfn,
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.config_write = i440fx_write_config,
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},{
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.qdev.name = "PIIX3",
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.qdev.desc = "ISA bridge",
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.qdev.size = sizeof(PIIX3State),
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.qdev.no_user = 1,
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.init = piix3_initfn,
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},{
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/* end of list */
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}
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};
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static SysBusDeviceInfo i440fx_pcihost_info = {
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.init = i440fx_pcihost_initfn,
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.qdev.name = "i440FX-pcihost",
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.qdev.size = sizeof(I440FXState),
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.qdev.no_user = 1,
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};
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static void i440fx_register(void)
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{
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sysbus_register_withprop(&i440fx_pcihost_info);
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pci_qdev_register_many(i440fx_info);
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}
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device_init(i440fx_register);
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