diff options
| -rw-r--r-- | hw/i386/pc.c | 47 |
1 files changed, 29 insertions, 18 deletions
diff --git a/hw/i386/pc.c b/hw/i386/pc.c index dee409d..12c436e 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -90,7 +90,9 @@ struct e820_table { struct e820_entry entry[E820_NR_ENTRIES]; } QEMU_PACKED __attribute((__aligned__(4))); -static struct e820_table e820_table; +static struct e820_table e820_reserve; +static struct e820_entry *e820_table; +static unsigned e820_entries; struct hpet_fw_config hpet_cfg = {.count = UINT8_MAX}; void gsi_handler(void *opaque, int n, int level) @@ -577,19 +579,32 @@ static void handle_a20_line_change(void *opaque, int irq, int level) int e820_add_entry(uint64_t address, uint64_t length, uint32_t type) { - int index = le32_to_cpu(e820_table.count); + int index = le32_to_cpu(e820_reserve.count); struct e820_entry *entry; - if (index >= E820_NR_ENTRIES) - return -EBUSY; - entry = &e820_table.entry[index++]; + if (type != E820_RAM) { + /* old FW_CFG_E820_TABLE entry -- reservations only */ + if (index >= E820_NR_ENTRIES) { + return -EBUSY; + } + entry = &e820_reserve.entry[index++]; + + entry->address = cpu_to_le64(address); + entry->length = cpu_to_le64(length); + entry->type = cpu_to_le32(type); - entry->address = cpu_to_le64(address); - entry->length = cpu_to_le64(length); - entry->type = cpu_to_le32(type); + e820_reserve.count = cpu_to_le32(index); + } - e820_table.count = cpu_to_le32(index); - return index; + /* new "etc/e820" file -- include ram too */ + e820_table = g_realloc(e820_table, + sizeof(struct e820_entry) * (e820_entries+1)); + e820_table[e820_entries].address = cpu_to_le64(address); + e820_table[e820_entries].length = cpu_to_le64(length); + e820_table[e820_entries].type = cpu_to_le32(type); + e820_entries++; + + return e820_entries; } /* Calculates the limit to CPU APIC ID values @@ -640,7 +655,9 @@ static FWCfgState *bochs_bios_init(void) fw_cfg_add_bytes(fw_cfg, FW_CFG_SMBIOS_ENTRIES, smbios_table, smbios_len); fw_cfg_add_bytes(fw_cfg, FW_CFG_E820_TABLE, - &e820_table, sizeof(e820_table)); + &e820_reserve, sizeof(e820_reserve)); + fw_cfg_add_file(fw_cfg, "etc/e820", e820_table, + sizeof(struct e820_entry) * e820_entries); fw_cfg_add_bytes(fw_cfg, FW_CFG_HPET, &hpet_cfg, sizeof(hpet_cfg)); /* allocate memory for the NUMA channel: one (64bit) word for the number @@ -1157,13 +1174,7 @@ FWCfgState *pc_memory_init(MemoryRegion *system_memory, memory_region_init_alias(ram_below_4g, NULL, "ram-below-4g", ram, 0, below_4g_mem_size); memory_region_add_subregion(system_memory, 0, ram_below_4g); - if (0) { - /* - * Ideally we should do that too, but that would ruin the e820 - * reservations added by seabios before initializing fw_cfg. - */ - e820_add_entry(0, below_4g_mem_size, E820_RAM); - } + e820_add_entry(0, below_4g_mem_size, E820_RAM); if (above_4g_mem_size > 0) { ram_above_4g = g_malloc(sizeof(*ram_above_4g)); memory_region_init_alias(ram_above_4g, NULL, "ram-above-4g", ram, |