diff options
| -rw-r--r-- | hw/Makefile.objs | 1 | ||||
| -rw-r--r-- | hw/pam.c | 87 | ||||
| -rw-r--r-- | hw/pam.h | 97 | ||||
| -rw-r--r-- | hw/piix_pci.c | 68 |
4 files changed, 200 insertions, 53 deletions
diff --git a/hw/Makefile.objs b/hw/Makefile.objs index ea46f8128e..5ebe6afd91 100644 --- a/hw/Makefile.objs +++ b/hw/Makefile.objs @@ -38,6 +38,7 @@ common-obj-$(CONFIG_SMARTCARD) += ccid-card-passthru.o common-obj-$(CONFIG_SMARTCARD_NSS) += ccid-card-emulated.o common-obj-$(CONFIG_I8259) += i8259_common.o i8259.o common-obj-y += fifo.o +common-obj-y += pam.o # PPC devices common-obj-$(CONFIG_PREP_PCI) += prep_pci.o diff --git a/hw/pam.c b/hw/pam.c new file mode 100644 index 0000000000..a95e2cfb07 --- /dev/null +++ b/hw/pam.c @@ -0,0 +1,87 @@ +/* + * QEMU i440FX/PIIX3 PCI Bridge Emulation + * + * Copyright (c) 2006 Fabrice Bellard + * Copyright (c) 2011 Isaku Yamahata <yamahata at valinux co jp> + * VA Linux Systems Japan K.K. + * Copyright (c) 2012 Jason Baron <jbaron@redhat.com> + * + * Split out from piix_pci.c + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "sysemu.h" +#include "pam.h" + +void smram_update(MemoryRegion *smram_region, uint8_t smram, + uint8_t smm_enabled) +{ + bool smram_enabled; + + smram_enabled = ((smm_enabled && (smram & SMRAM_G_SMRAME)) || + (smram & SMRAM_D_OPEN)); + memory_region_set_enabled(smram_region, !smram_enabled); +} + +void smram_set_smm(uint8_t *host_smm_enabled, int smm, uint8_t smram, + MemoryRegion *smram_region) +{ + uint8_t smm_enabled = (smm != 0); + if (*host_smm_enabled != smm_enabled) { + *host_smm_enabled = smm_enabled; + smram_update(smram_region, smram, *host_smm_enabled); + } +} + +void init_pam(MemoryRegion *ram_memory, MemoryRegion *system_memory, + MemoryRegion *pci_address_space, PAMMemoryRegion *mem, + uint32_t start, uint32_t size) +{ + int i; + + /* RAM */ + memory_region_init_alias(&mem->alias[3], "pam-ram", ram_memory, + start, size); + /* ROM (XXX: not quite correct) */ + memory_region_init_alias(&mem->alias[1], "pam-rom", ram_memory, + start, size); + memory_region_set_readonly(&mem->alias[1], true); + + /* XXX: should distinguish read/write cases */ + memory_region_init_alias(&mem->alias[0], "pam-pci", pci_address_space, + start, size); + memory_region_init_alias(&mem->alias[2], "pam-pci", pci_address_space, + start, size); + + for (i = 0; i < 4; ++i) { + memory_region_set_enabled(&mem->alias[i], false); + memory_region_add_subregion_overlap(system_memory, start, + &mem->alias[i], 1); + } + mem->current = 0; +} + +void pam_update(PAMMemoryRegion *pam, int idx, uint8_t val) +{ + assert(0 <= idx && idx <= 12); + + memory_region_set_enabled(&pam->alias[pam->current], false); + pam->current = (val >> ((!(idx & 1)) * 4)) & PAM_ATTR_MASK; + memory_region_set_enabled(&pam->alias[pam->current], true); +} diff --git a/hw/pam.h b/hw/pam.h new file mode 100644 index 0000000000..2d77ebe0d9 --- /dev/null +++ b/hw/pam.h @@ -0,0 +1,97 @@ +#ifndef QEMU_PAM_H +#define QEMU_PAM_H + +/* + * Copyright (c) 2006 Fabrice Bellard + * Copyright (c) 2011 Isaku Yamahata <yamahata at valinux co jp> + * VA Linux Systems Japan K.K. + * Copyright (c) 2012 Jason Baron <jbaron@redhat.com> + * + * Split out from piix_pci.c + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +/* + * SMRAM memory area and PAM memory area in Legacy address range for PC. + * PAM: Programmable Attribute Map registers + * + * 0xa0000 - 0xbffff compatible SMRAM + * + * 0xc0000 - 0xc3fff Expansion area memory segments + * 0xc4000 - 0xc7fff + * 0xc8000 - 0xcbfff + * 0xcc000 - 0xcffff + * 0xd0000 - 0xd3fff + * 0xd4000 - 0xd7fff + * 0xd8000 - 0xdbfff + * 0xdc000 - 0xdffff + * 0xe0000 - 0xe3fff Extended System BIOS Area Memory Segments + * 0xe4000 - 0xe7fff + * 0xe8000 - 0xebfff + * 0xec000 - 0xeffff + * + * 0xf0000 - 0xfffff System BIOS Area Memory Segments + */ + +#include "qemu-common.h" +#include "memory.h" + +#define SMRAM_C_BASE 0xa0000 +#define SMRAM_C_END 0xc0000 +#define SMRAM_C_SIZE 0x20000 + +#define PAM_EXPAN_BASE 0xc0000 +#define PAM_EXPAN_SIZE 0x04000 + +#define PAM_EXBIOS_BASE 0xe0000 +#define PAM_EXBIOS_SIZE 0x04000 + +#define PAM_BIOS_BASE 0xf0000 +#define PAM_BIOS_END 0xfffff +/* 64KB: Intel 3 series express chipset family p. 58*/ +#define PAM_BIOS_SIZE 0x10000 + +/* PAM registers: log nibble and high nibble*/ +#define PAM_ATTR_WE ((uint8_t)2) +#define PAM_ATTR_RE ((uint8_t)1) +#define PAM_ATTR_MASK ((uint8_t)3) + +/* SMRAM register */ +#define SMRAM_D_OPEN ((uint8_t)(1 << 6)) +#define SMRAM_D_CLS ((uint8_t)(1 << 5)) +#define SMRAM_D_LCK ((uint8_t)(1 << 4)) +#define SMRAM_G_SMRAME ((uint8_t)(1 << 3)) +#define SMRAM_C_BASE_SEG_MASK ((uint8_t)0x7) +#define SMRAM_C_BASE_SEG ((uint8_t)0x2) /* hardwired to b010 */ + +typedef struct PAMMemoryRegion { + MemoryRegion alias[4]; /* index = PAM value */ + unsigned current; +} PAMMemoryRegion; + +void smram_update(MemoryRegion *smram_region, uint8_t smram, + uint8_t smm_enabled); +void smram_set_smm(uint8_t *host_smm_enabled, int smm, uint8_t smram, + MemoryRegion *smram_region); +void init_pam(MemoryRegion *ram, MemoryRegion *system, MemoryRegion *pci, + PAMMemoryRegion *mem, uint32_t start, uint32_t size); +void pam_update(PAMMemoryRegion *mem, int idx, uint8_t val); + +#endif /* QEMU_PAM_H */ diff --git a/hw/piix_pci.c b/hw/piix_pci.c index 9af5847690..ba1b3de749 100644 --- a/hw/piix_pci.c +++ b/hw/piix_pci.c @@ -30,6 +30,7 @@ #include "sysbus.h" #include "range.h" #include "xen.h" +#include "pam.h" /* * I440FX chipset data sheet. @@ -68,11 +69,6 @@ typedef struct PIIX3State { int32_t pci_irq_levels_vmstate[PIIX_NUM_PIRQS]; } PIIX3State; -typedef struct PAMMemoryRegion { - MemoryRegion alias[4]; /* index = PAM value */ - unsigned current; -} PAMMemoryRegion; - struct PCII440FXState { PCIDevice dev; MemoryRegion *system_memory; @@ -105,52 +101,16 @@ static int pci_slot_get_pirq(PCIDevice *pci_dev, int pci_intx) return (pci_intx + slot_addend) & 3; } -static void init_pam(PCII440FXState *d, PAMMemoryRegion *mem, - uint32_t start, uint32_t size) -{ - int i; - - /* RAM */ - memory_region_init_alias(&mem->alias[3], "pam-ram", d->ram_memory, start, size); - /* ROM (XXX: not quite correct) */ - memory_region_init_alias(&mem->alias[1], "pam-rom", d->ram_memory, start, size); - memory_region_set_readonly(&mem->alias[1], true); - - /* XXX: should distinguish read/write cases */ - memory_region_init_alias(&mem->alias[0], "pam-pci", d->pci_address_space, - start, size); - memory_region_init_alias(&mem->alias[2], "pam-pci", d->pci_address_space, - start, size); - - for (i = 0; i < 4; ++i) { - memory_region_set_enabled(&mem->alias[i], false); - memory_region_add_subregion_overlap(d->system_memory, start, &mem->alias[i], 1); - } - mem->current = 0; -} - -static void update_pam(PAMMemoryRegion *pam, unsigned r) -{ - memory_region_set_enabled(&pam->alias[pam->current], false); - pam->current = r; - memory_region_set_enabled(&pam->alias[pam->current], true); -} - static void i440fx_update_memory_mappings(PCII440FXState *d) { - int i, r; - uint32_t smram; - bool smram_enabled; + int i; memory_region_transaction_begin(); - update_pam(&d->pam_regions[0], (d->dev.config[I440FX_PAM] >> 4) & 3); - for(i = 0; i < 12; i++) { - r = (d->dev.config[(i >> 1) + (I440FX_PAM + 1)] >> ((i & 1) * 4)) & 3; - update_pam(&d->pam_regions[i+1], r); + for (i = 0; i < 13; i++) { + pam_update(&d->pam_regions[i], i, + d->dev.config[I440FX_PAM + ((i + 1) / 2)]); } - smram = d->dev.config[I440FX_SMRAM]; - smram_enabled = (d->smm_enabled && (smram & 0x08)) || (smram & 0x40); - memory_region_set_enabled(&d->smram_region, !smram_enabled); + smram_update(&d->smram_region, d->dev.config[I440FX_SMRAM], d->smm_enabled); memory_region_transaction_commit(); } @@ -158,11 +118,10 @@ static void i440fx_set_smm(int val, void *arg) { PCII440FXState *d = arg; - val = (val != 0); - if (d->smm_enabled != val) { - d->smm_enabled = val; - i440fx_update_memory_mappings(d); - } + memory_region_transaction_begin(); + smram_set_smm(&d->smm_enabled, val, d->dev.config[I440FX_SMRAM], + &d->smram_region); + memory_region_transaction_commit(); } @@ -300,9 +259,12 @@ static PCIBus *i440fx_common_init(const char *device_name, memory_region_add_subregion_overlap(f->system_memory, 0xa0000, &f->smram_region, 1); memory_region_set_enabled(&f->smram_region, false); - init_pam(f, &f->pam_regions[0], 0xf0000, 0x10000); + init_pam(f->ram_memory, f->system_memory, f->pci_address_space, + &f->pam_regions[0], PAM_BIOS_BASE, PAM_BIOS_SIZE); for (i = 0; i < 12; ++i) { - init_pam(f, &f->pam_regions[i+1], 0xc0000 + i * 0x4000, 0x4000); + init_pam(f->ram_memory, f->system_memory, f->pci_address_space, + &f->pam_regions[i+1], PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE, + PAM_EXPAN_SIZE); } /* Xen supports additional interrupt routes from the PCI devices to |