From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:50750) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hHQbR-0003BM-ID for qemu-devel@nongnu.org; Fri, 19 Apr 2019 06:18:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hHQbQ-0002v0-8v for qemu-devel@nongnu.org; Fri, 19 Apr 2019 06:18:41 -0400 Received: from mel.act-europe.fr ([2a02:2ab8:224:1::a0a:d2]:58529 helo=smtp.eu.adacore.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hHQbP-0002tr-V2 for qemu-devel@nongnu.org; Fri, 19 Apr 2019 06:18:40 -0400 From: KONRAD Frederic Date: Fri, 19 Apr 2019 12:18:10 +0200 Message-Id: <1555669092-10351-2-git-send-email-frederic.konrad@adacore.com> In-Reply-To: <1555669092-10351-1-git-send-email-frederic.konrad@adacore.com> References: <1555669092-10351-1-git-send-email-frederic.konrad@adacore.com> Subject: [Qemu-devel] [PATCH V1 1/3] leon3: add a little bootloader List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, mark.cave-ayland@ilande.co.uk, atar4qemu@gmail.com, philmd@redhat.com, chouteau@adacore.com, frederic.konrad@adacore.com This adds a little bootloader to the leon3_machine when a ram image is given through the kernel parameter and no bios are provided: * The UART transmiter is enabled. * The TIMER is initialized. Signed-off-by: KONRAD Frederic --- hw/sparc/leon3.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 70 insertions(+), 10 deletions(-) diff --git a/hw/sparc/leon3.c b/hw/sparc/leon3.c index 774639a..2c6f486 100644 --- a/hw/sparc/leon3.c +++ b/hw/sparc/leon3.c @@ -1,7 +1,7 @@ /* * QEMU Leon3 System Emulator * - * Copyright (c) 2010-2011 AdaCore + * Copyright (c) 2010-2019 AdaCore * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal @@ -44,6 +44,8 @@ #define CPU_CLK (40 * 1000 * 1000) #define PROM_FILENAME "u-boot.bin" +#define LEON3_PROM_OFFSET (0x00000000) +#define LEON3_RAM_OFFSET (0x40000000) #define MAX_PILS 16 @@ -53,6 +55,55 @@ typedef struct ResetData { target_ulong sp; /* initial stack pointer */ } ResetData; +static uint32_t *gen_write_to_addr(uint32_t *code, hwaddr addr, uint32_t val) +{ + stl_p(code++, 0x82100000); /* mov %g0, %g1 */ + stl_p(code++, 0x84100000); /* mov %g0, %g2 */ + stl_p(code++, 0x03000000 + + extract32(addr, 10, 22)); + /* sethi %hi(addr), %g1 */ + stl_p(code++, 0x82106000 + + extract32(addr, 0, 10)); + /* or %g1, addr, %g1 */ + stl_p(code++, 0x05000000 + + extract32(val, 10, 22)); + /* sethi %hi(val), %g2 */ + stl_p(code++, 0x8410a000 + + extract32(val, 0, 10)); + /* or %g2, val, %g2 */ + stl_p(code++, 0xc4204000); /* st %g2, [ %g1 ] */ + + return code; +} + +/* + * When loading a kernel in RAM the machine is expected to be in a different + * state (eg: initialized by the bootloader). This little code reproduces + * this behavior. + */ +static void write_bootloader(CPUSPARCState *env, uint8_t *base, + hwaddr kernel_addr) +{ + uint32_t *p = (uint32_t *) base; + + /* Initialize the UARTs */ + p = gen_write_to_addr(p, 0x80000108, 3); + + /* Initialize the TIMER 0 */ + p = gen_write_to_addr(p, 0x80000304, 39); + p = gen_write_to_addr(p, 0x80000314, 0xFFFFFFFE); + p = gen_write_to_addr(p, 0x80000318, 3); + + /* JUMP to the entry point */ + stl_p(p++, 0x82100000); /* mov %g0, %g1 */ + stl_p(p++, 0x03000000 + extract32(kernel_addr, 10, 22)); + /* sethi %hi(kernel_addr), %g1 */ + stl_p(p++, 0x82106000 + extract32(kernel_addr, 0, 10)); + /* or kernel_addr, %g1 */ + stl_p(p++, 0x81c04000); /* jmp %g1 */ + stl_p(p++, 0x01000000); /* nop */ +} + static void main_cpu_reset(void *opaque) { ResetData *s = (ResetData *)opaque; @@ -131,11 +182,12 @@ static void leon3_generic_hw_init(MachineState *machine) /* Reset data */ reset_info = g_malloc0(sizeof(ResetData)); reset_info->cpu = cpu; - reset_info->sp = 0x40000000 + ram_size; + reset_info->sp = LEON3_RAM_OFFSET + ram_size; qemu_register_reset(main_cpu_reset, reset_info); /* Allocate IRQ manager */ - grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in); + grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, + &leon3_set_pil_in); env->qemu_irq_ack = leon3_irq_manager; @@ -148,13 +200,13 @@ static void leon3_generic_hw_init(MachineState *machine) } memory_region_allocate_system_memory(ram, NULL, "leon3.ram", ram_size); - memory_region_add_subregion(address_space_mem, 0x40000000, ram); + memory_region_add_subregion(address_space_mem, LEON3_RAM_OFFSET, ram); /* Allocate BIOS */ prom_size = 8 * MiB; memory_region_init_ram(prom, NULL, "Leon3.bios", prom_size, &error_fatal); memory_region_set_readonly(prom, true); - memory_region_add_subregion(address_space_mem, 0x00000000, prom); + memory_region_add_subregion(address_space_mem, LEON3_PROM_OFFSET, prom); /* Load boot prom */ if (bios_name == NULL) { @@ -174,7 +226,7 @@ static void leon3_generic_hw_init(MachineState *machine) } if (bios_size > 0) { - ret = load_image_targphys(filename, 0x00000000, bios_size); + ret = load_image_targphys(filename, LEON3_PROM_OFFSET, bios_size); if (ret < 0 || ret > prom_size) { error_report("could not load prom '%s'", filename); exit(1); @@ -198,10 +250,18 @@ static void leon3_generic_hw_init(MachineState *machine) exit(1); } if (bios_size <= 0) { - /* If there is no bios/monitor, start the application. */ - env->pc = entry; - env->npc = entry + 4; - reset_info->entry = entry; + /* + * If there is no bios/monitor just start the application but put + * the machine in an initialized state through a little + * bootloader. + */ + uint8_t *bootloader_entry; + + bootloader_entry = memory_region_get_ram_ptr(prom); + write_bootloader(env, bootloader_entry, entry); + env->pc = LEON3_PROM_OFFSET; + env->npc = LEON3_PROM_OFFSET + 4; + reset_info->entry = LEON3_PROM_OFFSET; } } -- 1.8.3.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8977DC282DA for ; 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Fri, 19 Apr 2019 06:18:41 -0400 Received: from mel.act-europe.fr ([2a02:2ab8:224:1::a0a:d2]:58529 helo=smtp.eu.adacore.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hHQbP-0002tr-V2 for qemu-devel@nongnu.org; Fri, 19 Apr 2019 06:18:40 -0400 Received: from localhost (localhost [127.0.0.1]) by filtered-smtp.eu.adacore.com (Postfix) with ESMTP id D20A281393; Fri, 19 Apr 2019 12:18:37 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at eu.adacore.com Received: from smtp.eu.adacore.com ([127.0.0.1]) by localhost (smtp.eu.adacore.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id RKDGppgIkXWq; Fri, 19 Apr 2019 12:18:37 +0200 (CEST) Received: from localhost.localdomain.localdomain (apoitiers-155-1-191-106.w109-220.abo.wanadoo.fr [109.220.154.106]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.eu.adacore.com (Postfix) with ESMTPSA id 928E181391; Fri, 19 Apr 2019 12:18:37 +0200 (CEST) From: KONRAD Frederic To: qemu-devel@nongnu.org Date: Fri, 19 Apr 2019 12:18:10 +0200 Message-Id: <1555669092-10351-2-git-send-email-frederic.konrad@adacore.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1555669092-10351-1-git-send-email-frederic.konrad@adacore.com> References: <1555669092-10351-1-git-send-email-frederic.konrad@adacore.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 2a02:2ab8:224:1::a0a:d2 Subject: [Qemu-devel] [PATCH V1 1/3] leon3: add a little bootloader X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, mark.cave-ayland@ilande.co.uk, chouteau@adacore.com, frederic.konrad@adacore.com, philmd@redhat.com, atar4qemu@gmail.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="UTF-8" Message-ID: <20190419101810.K_k-AFS_S6KpnapAlEu2iC1NouiK3jSmTJI3b6bSKHg@z> This adds a little bootloader to the leon3_machine when a ram image is given through the kernel parameter and no bios are provided: * The UART transmiter is enabled. * The TIMER is initialized. Signed-off-by: KONRAD Frederic --- hw/sparc/leon3.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 70 insertions(+), 10 deletions(-) diff --git a/hw/sparc/leon3.c b/hw/sparc/leon3.c index 774639a..2c6f486 100644 --- a/hw/sparc/leon3.c +++ b/hw/sparc/leon3.c @@ -1,7 +1,7 @@ /* * QEMU Leon3 System Emulator * - * Copyright (c) 2010-2011 AdaCore + * Copyright (c) 2010-2019 AdaCore * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal @@ -44,6 +44,8 @@ #define CPU_CLK (40 * 1000 * 1000) #define PROM_FILENAME "u-boot.bin" +#define LEON3_PROM_OFFSET (0x00000000) +#define LEON3_RAM_OFFSET (0x40000000) #define MAX_PILS 16 @@ -53,6 +55,55 @@ typedef struct ResetData { target_ulong sp; /* initial stack pointer */ } ResetData; +static uint32_t *gen_write_to_addr(uint32_t *code, hwaddr addr, uint32_t val) +{ + stl_p(code++, 0x82100000); /* mov %g0, %g1 */ + stl_p(code++, 0x84100000); /* mov %g0, %g2 */ + stl_p(code++, 0x03000000 + + extract32(addr, 10, 22)); + /* sethi %hi(addr), %g1 */ + stl_p(code++, 0x82106000 + + extract32(addr, 0, 10)); + /* or %g1, addr, %g1 */ + stl_p(code++, 0x05000000 + + extract32(val, 10, 22)); + /* sethi %hi(val), %g2 */ + stl_p(code++, 0x8410a000 + + extract32(val, 0, 10)); + /* or %g2, val, %g2 */ + stl_p(code++, 0xc4204000); /* st %g2, [ %g1 ] */ + + return code; +} + +/* + * When loading a kernel in RAM the machine is expected to be in a different + * state (eg: initialized by the bootloader). This little code reproduces + * this behavior. + */ +static void write_bootloader(CPUSPARCState *env, uint8_t *base, + hwaddr kernel_addr) +{ + uint32_t *p = (uint32_t *) base; + + /* Initialize the UARTs */ + p = gen_write_to_addr(p, 0x80000108, 3); + + /* Initialize the TIMER 0 */ + p = gen_write_to_addr(p, 0x80000304, 39); + p = gen_write_to_addr(p, 0x80000314, 0xFFFFFFFE); + p = gen_write_to_addr(p, 0x80000318, 3); + + /* JUMP to the entry point */ + stl_p(p++, 0x82100000); /* mov %g0, %g1 */ + stl_p(p++, 0x03000000 + extract32(kernel_addr, 10, 22)); + /* sethi %hi(kernel_addr), %g1 */ + stl_p(p++, 0x82106000 + extract32(kernel_addr, 0, 10)); + /* or kernel_addr, %g1 */ + stl_p(p++, 0x81c04000); /* jmp %g1 */ + stl_p(p++, 0x01000000); /* nop */ +} + static void main_cpu_reset(void *opaque) { ResetData *s = (ResetData *)opaque; @@ -131,11 +182,12 @@ static void leon3_generic_hw_init(MachineState *machine) /* Reset data */ reset_info = g_malloc0(sizeof(ResetData)); reset_info->cpu = cpu; - reset_info->sp = 0x40000000 + ram_size; + reset_info->sp = LEON3_RAM_OFFSET + ram_size; qemu_register_reset(main_cpu_reset, reset_info); /* Allocate IRQ manager */ - grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in); + grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, + &leon3_set_pil_in); env->qemu_irq_ack = leon3_irq_manager; @@ -148,13 +200,13 @@ static void leon3_generic_hw_init(MachineState *machine) } memory_region_allocate_system_memory(ram, NULL, "leon3.ram", ram_size); - memory_region_add_subregion(address_space_mem, 0x40000000, ram); + memory_region_add_subregion(address_space_mem, LEON3_RAM_OFFSET, ram); /* Allocate BIOS */ prom_size = 8 * MiB; memory_region_init_ram(prom, NULL, "Leon3.bios", prom_size, &error_fatal); memory_region_set_readonly(prom, true); - memory_region_add_subregion(address_space_mem, 0x00000000, prom); + memory_region_add_subregion(address_space_mem, LEON3_PROM_OFFSET, prom); /* Load boot prom */ if (bios_name == NULL) { @@ -174,7 +226,7 @@ static void leon3_generic_hw_init(MachineState *machine) } if (bios_size > 0) { - ret = load_image_targphys(filename, 0x00000000, bios_size); + ret = load_image_targphys(filename, LEON3_PROM_OFFSET, bios_size); if (ret < 0 || ret > prom_size) { error_report("could not load prom '%s'", filename); exit(1); @@ -198,10 +250,18 @@ static void leon3_generic_hw_init(MachineState *machine) exit(1); } if (bios_size <= 0) { - /* If there is no bios/monitor, start the application. */ - env->pc = entry; - env->npc = entry + 4; - reset_info->entry = entry; + /* + * If there is no bios/monitor just start the application but put + * the machine in an initialized state through a little + * bootloader. + */ + uint8_t *bootloader_entry; + + bootloader_entry = memory_region_get_ram_ptr(prom); + write_bootloader(env, bootloader_entry, entry); + env->pc = LEON3_PROM_OFFSET; + env->npc = LEON3_PROM_OFFSET + 4; + reset_info->entry = LEON3_PROM_OFFSET; } } -- 1.8.3.1