source: mainline/kernel/arch/ppc32/src/ppc32.c@ 080ad7f

/*
 * Copyright (c) 2005 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup ppc32
 * @{
 */
/** @file
 */

#include <config.h>
#include <arch.h>
#include <arch/boot/boot.h>
#include <genarch/drivers/via-cuda/cuda.h>
#include <arch/interrupt.h>
#include <genarch/fb/fb.h>
#include <genarch/fb/visuals.h>
#include <userspace.h>
#include <proc/uarg.h>
#include <console/console.h>
#include <ddi/irq.h>
#include <arch/drivers/pic.h>
#include <align.h>
#include <macros.h>
#include <string.h>

#define IRQ_COUNT  64
#define IRQ_CUDA   10

bootinfo_t bootinfo;

/** Performs ppc32-specific initialization before main_bsp() is called. */
void arch_pre_main(void)
{
        init.cnt = bootinfo.taskmap.count;
        
        uint32_t i;
        
        for (i = 0; i < min3(bootinfo.taskmap.count, TASKMAP_MAX_RECORDS, CONFIG_INIT_TASKS); i++) {
                init.tasks[i].addr = PA2KA(bootinfo.taskmap.tasks[i].addr);
                init.tasks[i].size = bootinfo.taskmap.tasks[i].size;
                str_cpy(init.tasks[i].name, CONFIG_TASK_NAME_BUFLEN,
                    bootinfo.taskmap.tasks[i].name);
        }
}

void arch_pre_mm_init(void)
{
        /* Initialize dispatch table */
        interrupt_init();

        /* Start decrementer */
        start_decrementer();
}

void arch_post_mm_init(void)
{
        if (config.cpu_active == 1) {

#ifdef CONFIG_FB
                /* Initialize framebuffer */
                if (bootinfo.screen.addr) {
                        unsigned int visual;
                        
                        switch (bootinfo.screen.bpp) {
                        case 8:
                                visual = VISUAL_INDIRECT_8;
                                break;
                        case 16:
                                visual = VISUAL_RGB_5_5_5;
                                break;
                        case 24:
                                visual = VISUAL_RGB_8_8_8;
                                break;
                        case 32:
                                visual = VISUAL_RGB_0_8_8_8;
                                break;
                        default:
                                panic("Unsupported bits per pixel.");
                        }
                        fb_properties_t prop = {
                                .addr = bootinfo.screen.addr,
                                .offset = 0,
                                .x = bootinfo.screen.width,
                                .y = bootinfo.screen.height,
                                .scan = bootinfo.screen.scanline,
                                .visual = visual,
                        };
                        fb_init(&prop);
                }
#endif
                
                /* Initialize IRQ routing */
                irq_init(IRQ_COUNT, IRQ_COUNT);
                
                if (bootinfo.macio.addr) {
                        /* Initialize PIC */
                        cir_t cir;
                        void *cir_arg;
                        pic_init(bootinfo.macio.addr, PAGE_SIZE, &cir, &cir_arg);
                        
#ifdef CONFIG_VIA_CUDA
                        uintptr_t pa = bootinfo.macio.addr + 0x16000;
                        uintptr_t aligned_addr = ALIGN_DOWN(pa, PAGE_SIZE);
                        size_t offset = pa - aligned_addr;
                        size_t size = 2 * PAGE_SIZE;
                        
                        cuda_t *cuda = (cuda_t *)
                            (hw_map(aligned_addr, offset + size) + offset);
                        
                        /* Initialize I/O controller */
                        cuda_instance_t *cuda_instance =
                            cuda_init(cuda, IRQ_CUDA, cir, cir_arg);
                        if (cuda_instance) {
                                indev_t *sink = stdin_wire();
                                cuda_wire(cuda_instance, sink);
                        }
#endif
                }
                
                /* Merge all zones to 1 big zone */
                zone_merge_all();
        }
}

void arch_post_cpu_init(void)
{
}

void arch_pre_smp_init(void)
{
}

void arch_post_smp_init(void)
{
}

void calibrate_delay_loop(void)
{
}

void userspace(uspace_arg_t *kernel_uarg)
{
        userspace_asm((uintptr_t) kernel_uarg->uspace_uarg,
            (uintptr_t) kernel_uarg->uspace_stack +
            THREAD_STACK_SIZE - SP_DELTA,
            (uintptr_t) kernel_uarg->uspace_entry);
        
        /* Unreachable */
        while (true);
}

/** Acquire console back for kernel
 *
 */
void arch_grab_console(void)
{
#ifdef CONFIG_FB
        fb_redraw();
#endif
}

/** Return console to userspace
 *
 */
void arch_release_console(void)
{
}

/** Construct function pointer
 *
 * @param fptr   function pointer structure
 * @param addr   function address
 * @param caller calling function address
 *
 * @return address of the function pointer
 *
 */
void *arch_construct_function(fncptr_t *fptr, void *addr, void *caller)
{
        return addr;
}

void arch_reboot(void)
{
        // TODO
        while (1);
}

/** @}
 */