From nobody Wed Nov 27 02:42:15 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=eik.bme.hu Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1701135228557707.5758686400646; Mon, 27 Nov 2023 17:33:48 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1r7myG-0006GA-4C; Mon, 27 Nov 2023 20:33:04 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r7myE-0006Fc-Lp; Mon, 27 Nov 2023 20:33:02 -0500 Received: from zero.eik.bme.hu ([152.66.115.2]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1r7myC-0003iC-MF; Mon, 27 Nov 2023 20:33:02 -0500 Received: from zero.eik.bme.hu (localhost [127.0.0.1]) by zero.eik.bme.hu (Postfix) with ESMTP id CB43975607B; Tue, 28 Nov 2023 02:32:55 +0100 (CET) Received: from zero.eik.bme.hu ([127.0.0.1]) by zero.eik.bme.hu (zero.eik.bme.hu [127.0.0.1]) (amavisd-new, port 10028) with ESMTP id IX55KPrWdfDX; Tue, 28 Nov 2023 02:32:53 +0100 (CET) Received: by zero.eik.bme.hu (Postfix, from userid 432) id 80524756078; Tue, 28 Nov 2023 02:32:53 +0100 (CET) X-Virus-Scanned: amavisd-new at eik.bme.hu From: BALATON Zoltan Subject: [PATCH v3] ppc/amigaone: Allow running AmigaOS without firmware image To: qemu-devel@nongnu.org, qemu-ppc@nongnu.org Cc: Nicholas Piggin , Daniel Henrique Barboza , clg@kaod.org, philmd@linaro.org Message-Id: <20231128013253.80524756078@zero.eik.bme.hu> Date: Tue, 28 Nov 2023 02:32:53 +0100 (CET) Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=152.66.115.2; envelope-from=balaton@eik.bme.hu; helo=zero.eik.bme.hu X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1701135231396000001 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" The machine uses a modified U-Boot under GPL license but the sources of it are lost with only a binary available so it cannot be included in QEMU. Allow running without the firmware image which can be used when calling a boot loader directly and thus simplifying booting guests. We need a small routine that AmigaOS calls from ROM which is added in this case to allow booting AmigaOS without external firmware image. Signed-off-by: BALATON Zoltan --- v3: Instead of -bios none do this when no -bios option given, use constants for address and rom_add_blob_fixed() to add dummy_fw. This makes both code and usage a bit simpler. hw/ppc/amigaone.c | 35 +++++++++++++++++++++++------------ 1 file changed, 23 insertions(+), 12 deletions(-) diff --git a/hw/ppc/amigaone.c b/hw/ppc/amigaone.c index 992a55e632..ddfa09457a 100644 --- a/hw/ppc/amigaone.c +++ b/hw/ppc/amigaone.c @@ -36,10 +36,19 @@ * -device VGA,romfile=3DVGABIOS-lgpl-latest.bin * from http://www.nongnu.org/vgabios/ instead. */ -#define PROM_FILENAME "u-boot-amigaone.bin" #define PROM_ADDR 0xfff00000 #define PROM_SIZE (512 * KiB) =20 +/* AmigaOS calls this routine from ROM, use this if no firmware loaded */ +static const char dummy_fw[] =3D { + 0x38, 0x00, 0x00, 0x08, /* li r0,8 */ + 0x7c, 0x09, 0x03, 0xa6, /* mtctr r0 */ + 0x54, 0x63, 0xf8, 0x7e, /* srwi r3,r3,1 */ + 0x42, 0x00, 0xff, 0xfc, /* bdnz 0x8 */ + 0x7c, 0x63, 0x18, 0xf8, /* not r3,r3 */ + 0x4e, 0x80, 0x00, 0x20, /* blr */ +}; + static void amigaone_cpu_reset(void *opaque) { PowerPCCPU *cpu =3D opaque; @@ -60,8 +69,6 @@ static void amigaone_init(MachineState *machine) PowerPCCPU *cpu; CPUPPCState *env; MemoryRegion *rom, *pci_mem, *mr; - const char *fwname =3D machine->firmware ?: PROM_FILENAME; - char *filename; ssize_t sz; PCIBus *pci_bus; Object *via; @@ -94,20 +101,24 @@ static void amigaone_init(MachineState *machine) } =20 /* allocate and load firmware */ - filename =3D qemu_find_file(QEMU_FILE_TYPE_BIOS, fwname); - if (filename) { - rom =3D g_new(MemoryRegion, 1); - memory_region_init_rom(rom, NULL, "rom", PROM_SIZE, &error_fatal); - memory_region_add_subregion(get_system_memory(), PROM_ADDR, rom); + rom =3D g_new(MemoryRegion, 1); + memory_region_init_rom(rom, NULL, "rom", PROM_SIZE, &error_fatal); + memory_region_add_subregion(get_system_memory(), PROM_ADDR, rom); + if (!machine->firmware) { + rom_add_blob_fixed("dummy-fw", dummy_fw, sizeof(dummy_fw), + PROM_ADDR + PROM_SIZE - 0x80); + } else { + g_autofree char *filename =3D qemu_find_file(QEMU_FILE_TYPE_BIOS, + machine->firmware); + if (!filename) { + error_report("Could not find firmware '%s'", machine->firmware= ); + exit(1); + } sz =3D load_image_targphys(filename, PROM_ADDR, PROM_SIZE); if (sz <=3D 0 || sz > PROM_SIZE) { error_report("Could not load firmware '%s'", filename); exit(1); } - g_free(filename); - } else if (!qtest_enabled()) { - error_report("Could not find firmware '%s'", fwname); - exit(1); } =20 /* Articia S */ --=20 2.30.9