[mirror_qemu.git] / hw / nios2 / boot.c

/*
 * Nios2 kernel loader
 *
 * Copyright (c) 2016 Marek Vasut <marek.vasut@gmail.com>
 *
 * Based on microblaze kernel loader
 *
 * Copyright (c) 2012 Peter Crosthwaite <peter.crosthwaite@petalogix.com>
 * Copyright (c) 2012 PetaLogix
 * Copyright (c) 2009 Edgar E. Iglesias.
 *
 * 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 "qemu/osdep.h"
#include "qemu-common.h"
#include "cpu.h"
#include "qemu/option.h"
#include "qemu/config-file.h"
#include "qemu/error-report.h"
#include "sysemu/device_tree.h"
#include "sysemu/sysemu.h"
#include "hw/loader.h"
#include "elf.h"
#include "qemu/cutils.h"

#include "boot.h"

#define NIOS2_MAGIC    0x534f494e

static struct nios2_boot_info {
    void (*machine_cpu_reset)(Nios2CPU *);
    uint32_t bootstrap_pc;
    uint32_t cmdline;
    uint32_t initrd_start;
    uint32_t initrd_end;
    uint32_t fdt;
} boot_info;

static void main_cpu_reset(void *opaque)
{
    Nios2CPU *cpu = opaque;
    CPUState *cs = CPU(cpu);
    CPUNios2State *env = &cpu->env;

    cpu_reset(CPU(cpu));

    env->regs[R_ARG0] = NIOS2_MAGIC;
    env->regs[R_ARG1] = boot_info.initrd_start;
    env->regs[R_ARG2] = boot_info.fdt;
    env->regs[R_ARG3] = boot_info.cmdline;

    cpu_set_pc(cs, boot_info.bootstrap_pc);
    if (boot_info.machine_cpu_reset) {
        boot_info.machine_cpu_reset(cpu);
    }
}

static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
{
    return addr - 0xc0000000LL;
}

static int nios2_load_dtb(struct nios2_boot_info bi, const uint32_t ramsize,
                          const char *kernel_cmdline, const char *dtb_filename)
{
    int fdt_size;
    void *fdt = NULL;
    int r;

    if (dtb_filename) {
        fdt = load_device_tree(dtb_filename, &fdt_size);
    }
    if (!fdt) {
        return 0;
    }

    if (kernel_cmdline) {
        r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
                                    kernel_cmdline);
        if (r < 0) {
            fprintf(stderr, "couldn't set /chosen/bootargs\n");
        }
    }

    if (bi.initrd_start) {
        qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
                              translate_kernel_address(NULL, bi.initrd_start));

        qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
                              translate_kernel_address(NULL, bi.initrd_end));
    }

    cpu_physical_memory_write(bi.fdt, fdt, fdt_size);
    return fdt_size;
}

void nios2_load_kernel(Nios2CPU *cpu, hwaddr ddr_base,
                            uint32_t ramsize,
                            const char *initrd_filename,
                            const char *dtb_filename,
                            void (*machine_cpu_reset)(Nios2CPU *))
{
    QemuOpts *machine_opts;
    const char *kernel_filename;
    const char *kernel_cmdline;
    const char *dtb_arg;
    char *filename = NULL;

    machine_opts = qemu_get_machine_opts();
    kernel_filename = qemu_opt_get(machine_opts, "kernel");
    kernel_cmdline = qemu_opt_get(machine_opts, "append");
    dtb_arg = qemu_opt_get(machine_opts, "dtb");
    /* default to pcbios dtb as passed by machine_init */
    if (!dtb_arg) {
        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
    }

    boot_info.machine_cpu_reset = machine_cpu_reset;
    qemu_register_reset(main_cpu_reset, cpu);

    if (kernel_filename) {
        int kernel_size, fdt_size;
        uint64_t entry, low, high;
        uint32_t base32;
        int big_endian = 0;

#ifdef TARGET_WORDS_BIGENDIAN
        big_endian = 1;
#endif

        /* Boots a kernel elf binary. */
        kernel_size = load_elf(kernel_filename, NULL, NULL,
                               &entry, &low, &high,
                               big_endian, EM_ALTERA_NIOS2, 0, 0);
        base32 = entry;
        if (base32 == 0xc0000000) {
            kernel_size = load_elf(kernel_filename, translate_kernel_address,
                                   NULL, &entry, NULL, NULL,
                                   big_endian, EM_ALTERA_NIOS2, 0, 0);
        }

        /* Always boot into physical ram. */
        boot_info.bootstrap_pc = ddr_base + 0xc0000000 + (entry & 0x07ffffff);

        /* If it wasn't an ELF image, try an u-boot image. */
        if (kernel_size < 0) {
            hwaddr uentry, loadaddr;

            kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0,
                                      NULL, NULL);
            boot_info.bootstrap_pc = uentry;
            high = loadaddr + kernel_size;
        }

        /* Not an ELF image nor an u-boot image, try a RAW image. */
        if (kernel_size < 0) {
            kernel_size = load_image_targphys(kernel_filename, ddr_base,
                                              ram_size);
            boot_info.bootstrap_pc = ddr_base;
            high = ddr_base + kernel_size;
        }

        high = ROUND_UP(high, 1024 * 1024);

        /* If initrd is available, it goes after the kernel, aligned to 1M. */
        if (initrd_filename) {
            int initrd_size;
            uint32_t initrd_offset;

            boot_info.initrd_start = high;
            initrd_offset = boot_info.initrd_start - ddr_base;

            initrd_size = load_ramdisk(initrd_filename,
                                       boot_info.initrd_start,
                                       ram_size - initrd_offset);
            if (initrd_size < 0) {
                initrd_size = load_image_targphys(initrd_filename,
                                                  boot_info.initrd_start,
                                                  ram_size - initrd_offset);
            }
            if (initrd_size < 0) {
                error_report("could not load initrd '%s'",
                             initrd_filename);
                exit(EXIT_FAILURE);
            }
            high += initrd_size;
        }
        high = ROUND_UP(high, 4);
        boot_info.initrd_end = high;

        /* Device tree must be placed right after initrd (if available) */
        boot_info.fdt = high;
        fdt_size = nios2_load_dtb(boot_info, ram_size, kernel_cmdline,
                                  /* Preference a -dtb argument */
                                  dtb_arg ? dtb_arg : filename);
        high += fdt_size;

        /* Kernel command is at the end, 4k aligned. */
        boot_info.cmdline = ROUND_UP(high, 4096);
        if (kernel_cmdline && strlen(kernel_cmdline)) {
            pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
        }
    }
    g_free(filename);
}
Commit	Line	Data
b7862564 MV	1	/*
	2	* Nios2 kernel loader
	3	*
	4	* Copyright (c) 2016 Marek Vasut <marek.vasut@gmail.com>
	5	*
	6	* Based on microblaze kernel loader
	7	*
	8	* Copyright (c) 2012 Peter Crosthwaite <peter.crosthwaite@petalogix.com>
	9	* Copyright (c) 2012 PetaLogix
	10	* Copyright (c) 2009 Edgar E. Iglesias.
	11	*
	12	* Permission is hereby granted, free of charge, to any person obtaining a copy
	13	* of this software and associated documentation files (the "Software"), to deal
	14	* in the Software without restriction, including without limitation the rights
	15	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	16	* copies of the Software, and to permit persons to whom the Software is
	17	* furnished to do so, subject to the following conditions:
	18	*
	19	* The above copyright notice and this permission notice shall be included in
	20	* all copies or substantial portions of the Software.
	21	*
	22	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	23	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	24	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	25	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	26	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	27	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	28	* THE SOFTWARE.
	29	*/
	30
	31	#include "qemu/osdep.h"
	32	#include "qemu-common.h"
	33	#include "cpu.h"
	34	#include "qemu/option.h"
	35	#include "qemu/config-file.h"
	36	#include "qemu/error-report.h"
b7862564 MV	37	#include "sysemu/device_tree.h"
	38	#include "sysemu/sysemu.h"
	39	#include "hw/loader.h"
	40	#include "elf.h"
	41	#include "qemu/cutils.h"
	42
	43	#include "boot.h"
	44
	45	#define NIOS2_MAGIC 0x534f494e
	46
	47	static struct nios2_boot_info {
	48	void (machine_cpu_reset)(Nios2CPU );
	49	uint32_t bootstrap_pc;
	50	uint32_t cmdline;
	51	uint32_t initrd_start;
	52	uint32_t initrd_end;
	53	uint32_t fdt;
	54	} boot_info;
	55
	56	static void main_cpu_reset(void *opaque)
	57	{
	58	Nios2CPU *cpu = opaque;
	59	CPUState *cs = CPU(cpu);
	60	CPUNios2State *env = &cpu->env;
	61
	62	cpu_reset(CPU(cpu));
	63
	64	env->regs[R_ARG0] = NIOS2_MAGIC;
	65	env->regs[R_ARG1] = boot_info.initrd_start;
	66	env->regs[R_ARG2] = boot_info.fdt;
	67	env->regs[R_ARG3] = boot_info.cmdline;
	68
	69	cpu_set_pc(cs, boot_info.bootstrap_pc);
	70	if (boot_info.machine_cpu_reset) {
	71	boot_info.machine_cpu_reset(cpu);
	72	}
	73	}
	74
	75	static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
	76	{
	77	return addr - 0xc0000000LL;
	78	}
	79
	80	static int nios2_load_dtb(struct nios2_boot_info bi, const uint32_t ramsize,
	81	const char kernel_cmdline, const char dtb_filename)
	82	{
	83	int fdt_size;
	84	void *fdt = NULL;
	85	int r;
	86
	87	if (dtb_filename) {
	88	fdt = load_device_tree(dtb_filename, &fdt_size);
	89	}
	90	if (!fdt) {
	91	return 0;
	92	}
	93
	94	if (kernel_cmdline) {
	95	r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
	96	kernel_cmdline);
	97	if (r < 0) {
	98	fprintf(stderr, "couldn't set /chosen/bootargs\n");
	99	}
	100	}
101
102	if (bi.initrd_start) {
103	qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
104	translate_kernel_address(NULL, bi.initrd_start));
105
106	qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
107	translate_kernel_address(NULL, bi.initrd_end));
108	}
109
110	cpu_physical_memory_write(bi.fdt, fdt, fdt_size);
111	return fdt_size;
112	}
113
114	void nios2_load_kernel(Nios2CPU *cpu, hwaddr ddr_base,
115	uint32_t ramsize,
116	const char *initrd_filename,
117	const char *dtb_filename,
118	void (machine_cpu_reset)(Nios2CPU ))
119	{
120	QemuOpts *machine_opts;
121	const char *kernel_filename;
122	const char *kernel_cmdline;
123	const char *dtb_arg;
124	char *filename = NULL;
125
126	machine_opts = qemu_get_machine_opts();
127	kernel_filename = qemu_opt_get(machine_opts, "kernel");
128	kernel_cmdline = qemu_opt_get(machine_opts, "append");
129	dtb_arg = qemu_opt_get(machine_opts, "dtb");
130	/* default to pcbios dtb as passed by machine_init */
131	if (!dtb_arg) {
132	filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
133	}
134
135	boot_info.machine_cpu_reset = machine_cpu_reset;
136	qemu_register_reset(main_cpu_reset, cpu);
137
138	if (kernel_filename) {
139	int kernel_size, fdt_size;
140	uint64_t entry, low, high;
141	uint32_t base32;
142	int big_endian = 0;
143
144	#ifdef TARGET_WORDS_BIGENDIAN
145	big_endian = 1;
146	#endif
147
148	/* Boots a kernel elf binary. */
149	kernel_size = load_elf(kernel_filename, NULL, NULL,
150	&entry, &low, &high,
151	big_endian, EM_ALTERA_NIOS2, 0, 0);
152	base32 = entry;
153	if (base32 == 0xc0000000) {
154	kernel_size = load_elf(kernel_filename, translate_kernel_address,
155	NULL, &entry, NULL, NULL,
156	big_endian, EM_ALTERA_NIOS2, 0, 0);
157	}
158
159	/* Always boot into physical ram. */
160	boot_info.bootstrap_pc = ddr_base + 0xc0000000 + (entry & 0x07ffffff);
161
162	/* If it wasn't an ELF image, try an u-boot image. */
163	if (kernel_size < 0) {
164	hwaddr uentry, loadaddr;
165
166	kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0,
167	NULL, NULL);
168	boot_info.bootstrap_pc = uentry;
169	high = loadaddr + kernel_size;
170	}
171
172	/* Not an ELF image nor an u-boot image, try a RAW image. */
173	if (kernel_size < 0) {
174	kernel_size = load_image_targphys(kernel_filename, ddr_base,
175	ram_size);
176	boot_info.bootstrap_pc = ddr_base;
177	high = ddr_base + kernel_size;
178	}
179
180	high = ROUND_UP(high, 1024 * 1024);
181
182	/* If initrd is available, it goes after the kernel, aligned to 1M. */
183	if (initrd_filename) {
184	int initrd_size;
185	uint32_t initrd_offset;
186
187	boot_info.initrd_start = high;
188	initrd_offset = boot_info.initrd_start - ddr_base;
189
190	initrd_size = load_ramdisk(initrd_filename,
191	boot_info.initrd_start,
192	ram_size - initrd_offset);
193	if (initrd_size < 0) {
194	initrd_size = load_image_targphys(initrd_filename,
195	boot_info.initrd_start,
196	ram_size - initrd_offset);
197	}
198	if (initrd_size < 0) {
d0e31a10	199	error_report("could not load initrd '%s'",
b7862564 MV	200	initrd_filename);
	201	exit(EXIT_FAILURE);
	202	}
	203	high += initrd_size;
	204	}
	205	high = ROUND_UP(high, 4);
	206	boot_info.initrd_end = high;
	207
	208	/* Device tree must be placed right after initrd (if available) */
	209	boot_info.fdt = high;
	210	fdt_size = nios2_load_dtb(boot_info, ram_size, kernel_cmdline,
	211	/* Preference a -dtb argument */
	212	dtb_arg ? dtb_arg : filename);
	213	high += fdt_size;
	214
	215	/* Kernel command is at the end, 4k aligned. */
	216	boot_info.cmdline = ROUND_UP(high, 4096);
	217	if (kernel_cmdline && strlen(kernel_cmdline)) {
	218	pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
	219	}
	220	}
	221	g_free(filename);
	222	}