From: BALATON Zoltan via <qemu-devel@nongnu.org>
To: qemu-devel@nongnu.org, qemu-ppc@nongnu.org
Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Subject: [PATCH v8 1/5] mac_oldworld: Allow loading binary ROM image
Date: Fri, 16 Oct 2020 01:47:17 +0200 [thread overview]
Message-ID: <1789fdb8ceb8894720ea3082976a0a5a0f58f1ad.1602805637.git.balaton@eik.bme.hu> (raw)
In-Reply-To: <cover.1602805637.git.balaton@eik.bme.hu>
The beige G3 Power Macintosh has a 4MB firmware ROM. Fix the size of
the rom region and fall back to loading a binary image with -bios if
loading ELF image failed. This allows testing emulation with a ROM
image from real hardware as well as using an ELF OpenBIOS image.
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
hw/ppc/mac_oldworld.c | 29 ++++++++++++++++++++---------
1 file changed, 20 insertions(+), 9 deletions(-)
diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
index 05e46ee6fe..0a40769b3e 100644
--- a/hw/ppc/mac_oldworld.c
+++ b/hw/ppc/mac_oldworld.c
@@ -59,6 +59,8 @@
#define NDRV_VGA_FILENAME "qemu_vga.ndrv"
#define GRACKLE_BASE 0xfec00000
+#define PROM_BASE 0xffc00000
+#define PROM_SIZE (4 * MiB)
static void fw_cfg_boot_set(void *opaque, const char *boot_device,
Error **errp)
@@ -100,6 +102,7 @@ static void ppc_heathrow_init(MachineState *machine)
SysBusDevice *s;
DeviceState *dev, *pic_dev;
BusState *adb_bus;
+ uint64_t bios_addr;
int bios_size;
unsigned int smp_cpus = machine->smp.cpus;
uint16_t ppc_boot_device;
@@ -128,24 +131,32 @@ static void ppc_heathrow_init(MachineState *machine)
memory_region_add_subregion(sysmem, 0, machine->ram);
- /* allocate and load BIOS */
- memory_region_init_rom(bios, NULL, "ppc_heathrow.bios", BIOS_SIZE,
+ /* allocate and load firmware ROM */
+ memory_region_init_rom(bios, NULL, "ppc_heathrow.bios", PROM_SIZE,
&error_fatal);
+ memory_region_add_subregion(sysmem, PROM_BASE, bios);
- if (bios_name == NULL)
+ if (!bios_name) {
bios_name = PROM_FILENAME;
+ }
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
- memory_region_add_subregion(sysmem, PROM_ADDR, bios);
-
- /* Load OpenBIOS (ELF) */
if (filename) {
- bios_size = load_elf(filename, NULL, 0, NULL, NULL, NULL, NULL, NULL,
- 1, PPC_ELF_MACHINE, 0, 0);
+ /* Load OpenBIOS (ELF) */
+ bios_size = load_elf(filename, NULL, NULL, NULL, NULL, &bios_addr,
+ NULL, NULL, 1, PPC_ELF_MACHINE, 0, 0);
+ /* Unfortunately, load_elf sign-extends reading elf32 */
+ bios_addr = (target_ulong)bios_addr;
+
+ if (bios_size <= 0) {
+ /* or load binary ROM image */
+ bios_size = load_image_targphys(filename, PROM_BASE, PROM_SIZE);
+ bios_addr = PROM_BASE;
+ }
g_free(filename);
} else {
bios_size = -1;
}
- if (bios_size < 0 || bios_size > BIOS_SIZE) {
+ if (bios_size < 0 || bios_addr - PROM_BASE + bios_size > PROM_SIZE) {
error_report("could not load PowerPC bios '%s'", bios_name);
exit(1);
}
--
2.21.3
next prev parent reply other threads:[~2020-10-16 0:23 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-15 23:47 [PATCH v8 0/5] Mac Old World ROM experiment (ppc/mac_* clean ups and loading binary ROM) BALATON Zoltan via
2020-10-15 23:47 ` [PATCH v8 4/5] mac_oldworld: Drop some variables BALATON Zoltan via
2020-10-15 23:47 ` BALATON Zoltan via [this message]
2020-10-15 23:47 ` [PATCH v8 5/5] mac_oldworld: Change PCI address of macio to match real hardware BALATON Zoltan via
2020-10-15 23:47 ` [PATCH v8 2/5] mac_newworld: Allow loading binary ROM image BALATON Zoltan via
2020-10-15 23:47 ` [PATCH v8 3/5] mac_oldworld: Drop a variable, use get_system_memory() directly BALATON Zoltan via
2020-10-16 9:58 ` [PATCH v8 0/5] Mac Old World ROM experiment (ppc/mac_* clean ups and loading binary ROM) Mark Cave-Ayland
2020-10-16 12:19 ` BALATON Zoltan via
2020-10-17 12:54 ` Mark Cave-Ayland
2020-10-17 15:56 ` BALATON Zoltan via
2020-10-18 16:01 ` Mark Cave-Ayland
2020-10-16 13:05 ` Philippe Mathieu-Daudé
2020-10-17 16:39 ` BALATON Zoltan via
2020-10-17 17:44 ` Philippe Mathieu-Daudé
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