// SPDX-License-Identifier: GPL-2.0-only
/*
 *  PS3 bootwrapper support.
 *
 *  Copyright (C) 2007 Sony Computer Entertainment Inc.
 *  Copyright 2007 Sony Corp.
 */

#include <stdarg.h>
#include <stddef.h>
#include "types.h"
#include "elf.h"
#include "string.h"
#include "stdio.h"
#include "page.h"
#include "ops.h"

extern int lv1_panic(u64 in_1);
extern int lv1_get_logical_partition_id(u64 *out_1);
extern int lv1_get_logical_ppe_id(u64 *out_1);
extern int lv1_get_repository_node_value(u64 in_1, u64 in_2, u64 in_3,
        u64 in_4, u64 in_5, u64 *out_1, u64 *out_2);

BSS_STACK(4096);

/* A buffer that may be edited by tools operating on a zImage binary so as to
 * edit the command line passed to vmlinux (by setting /chosen/bootargs).
 * The buffer is put in its own section so that tools may locate it easier.
 */

static char cmdline[BOOT_COMMAND_LINE_SIZE]
        __attribute__((__section__("__builtin_cmdline")));

static void prep_cmdline(void *chosen)
{
        if (cmdline[0] == '\0')
                getprop(chosen, "bootargs", cmdline, BOOT_COMMAND_LINE_SIZE-1);
        else
                setprop_str(chosen, "bootargs", cmdline);

        printf("cmdline: '%s'\n", cmdline);
}

static void ps3_console_write(const char *buf, int len)
{
}

static void ps3_exit(void)
{
        printf("ps3_exit\n");

        /* lv1_panic will shutdown the lpar. */

        lv1_panic(0); /* zero = do not reboot */
        while (1);
}

static int ps3_repository_read_rm_size(u64 *rm_size)
{
        int result;
        u64 lpar_id;
        u64 ppe_id;
        u64 v2;

        result = lv1_get_logical_partition_id(&lpar_id);

        if (result)
                return -1;

        result = lv1_get_logical_ppe_id(&ppe_id);

        if (result)
                return -1;

        /*
         * n1: 0000000062690000 : ....bi..
         * n2: 7075000000000000 : pu......
         * n3: 0000000000000001 : ........
         * n4: 726d5f73697a6500 : rm_size.
        */

        result = lv1_get_repository_node_value(lpar_id, 0x0000000062690000ULL,
                0x7075000000000000ULL, ppe_id, 0x726d5f73697a6500ULL, rm_size,
                &v2);

        printf("%s:%d: ppe_id  %lu \n", __func__, __LINE__,
                (unsigned long)ppe_id);
        printf("%s:%d: lpar_id %lu \n", __func__, __LINE__,
                (unsigned long)lpar_id);
        printf("%s:%d: rm_size %llxh \n", __func__, __LINE__, *rm_size);

        return result ? -1 : 0;
}

void ps3_copy_vectors(void)
{
        extern char __system_reset_kernel[];

        memcpy((void *)0x100, __system_reset_kernel, 512);
        flush_cache((void *)0x100, 512);
}

void platform_init(void)
{
        const u32 heapsize = 0x1000000 - (u32)_end; /* 16MiB */
        void *chosen;
        unsigned long ft_addr;
        u64 rm_size;

        console_ops.write = ps3_console_write;
        platform_ops.exit = ps3_exit;

        printf("\n-- PS3 bootwrapper --\n");

        simple_alloc_init(_end, heapsize, 32, 64);
        fdt_init(_dtb_start);

        chosen = finddevice("/chosen");

        ps3_repository_read_rm_size(&rm_size);
        dt_fixup_memory(0, rm_size);

        if (&_initrd_end > &_initrd_start) {
                setprop_val(chosen, "linux,initrd-start", (u32)(_initrd_start));
                setprop_val(chosen, "linux,initrd-end", (u32)(_initrd_end));
        }

        prep_cmdline(chosen);

        ft_addr = dt_ops.finalize();

        ps3_copy_vectors();

        printf(" flat tree at 0x%lx\n\r", ft_addr);

        ((kernel_entry_t)0)(ft_addr, 0, NULL);

        ps3_exit();
}