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1810 decky 1
/*
2071 jermar 2
 * Copyright (c) 2006 Martin Decky
1810 decky 3
 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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1952 jermar 29
/** @addtogroup ia32xen
1810 decky 30
 * @{
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 */
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/** @file
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 */
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#include <arch.h>
1833 decky 36
#include <main/main.h>
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#include <arch/types.h>
1824 decky 39
#include <align.h>
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#include <arch/pm.h>
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1816 decky 43
#include <arch/drivers/xconsole.h>
1824 decky 44
#include <arch/mm/page.h>
1810 decky 45
 
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#include <arch/context.h>
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#include <config.h>
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#include <arch/interrupt.h>
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#include <arch/asm.h>
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#include <genarch/acpi/acpi.h>
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#include <arch/bios/bios.h>
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#include <interrupt.h>
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#include <arch/debugger.h>
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#include <proc/thread.h>
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#include <syscall/syscall.h>
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#include <console/console.h>
1959 decky 61
#include <ddi/irq.h>
1810 decky 62
 
1813 decky 63
start_info_t start_info;
1824 decky 64
memzone_t meminfo;
1813 decky 65
 
1829 decky 66
extern void xen_callback(void);
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extern void xen_failsafe_callback(void);
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1824 decky 69
void arch_pre_main(void)
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{
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    pte_t pte;
3104 svoboda 72
    memsetb(&pte, sizeof(pte), 0);
1824 decky 73
 
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    pte.present = 1;
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    pte.writeable = 1;
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    pte.frame_address = ADDR2PFN((uintptr_t) start_info.shared_info);
2017 decky 77
    ASSERT(xen_update_va_mapping(&shared_info, pte, UVMF_INVLPG) == 0);
1824 decky 78
 
2017 decky 79
    if (!(start_info.flags & SIF_INITDOMAIN)) {
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        /* Map console frame */
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        pte.present = 1;
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        pte.writeable = 1;
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        pte.frame_address = start_info.console.domU.mfn;
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        ASSERT(xen_update_va_mapping(&console_page, pte, UVMF_INVLPG) == 0);
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    } else
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        start_info.console.domU.evtchn = 0;
1832 decky 87
 
2017 decky 88
    ASSERT(xen_set_callbacks(XEN_CS, xen_callback, XEN_CS, xen_failsafe_callback) == 0);
1829 decky 89
 
1824 decky 90
    /* Create identity mapping */
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    meminfo.start = ADDR2PFN(ALIGN_UP(KA2PA(start_info.ptl0), PAGE_SIZE)) + start_info.pt_frames;
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    meminfo.size = start_info.frames - meminfo.start;
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    meminfo.reserved = 0;
2017 decky 95
 
1824 decky 96
    uintptr_t pa;
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    index_t last_ptl0 = 0;
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    for (pa = PFN2ADDR(meminfo.start); pa < PFN2ADDR(meminfo.start + meminfo.size); pa += FRAME_SIZE) {
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        uintptr_t va = PA2KA(pa);
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        if ((PTL0_INDEX(va) != last_ptl0) && (GET_PTL1_FLAGS(start_info.ptl0, PTL0_INDEX(va)) & PAGE_NOT_PRESENT)) {
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            /* New page directory entry needed */
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            uintptr_t tpa = PFN2ADDR(meminfo.start + meminfo.reserved);
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            uintptr_t tva = PA2KA(tpa);
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3104 svoboda 106
            memsetb((void *) tva, PAGE_SIZE, 0);
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            pte_t *tptl3 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(tva)));
2017 decky 109
            SET_FRAME_ADDRESS(tptl3, PTL3_INDEX(tva), 0);
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            SET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(va), tpa);
2017 decky 111
            SET_FRAME_ADDRESS(tptl3, PTL3_INDEX(tva), tpa);
1824 decky 112
 
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            last_ptl0 = PTL0_INDEX(va);
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            meminfo.reserved++;
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        }
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        pte_t *ptl3 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(start_info.ptl0, PTL0_INDEX(va)));
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        SET_FRAME_ADDRESS(ptl3, PTL3_INDEX(va), pa);
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        SET_FRAME_FLAGS(ptl3, PTL3_INDEX(va), PAGE_PRESENT | PAGE_WRITE);
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    }
1834 decky 122
 
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    /* Put initial stack safely in the mapped area */
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    stack_safe = PA2KA(PFN2ADDR(meminfo.start + meminfo.reserved));
1824 decky 125
}
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1810 decky 127
void arch_pre_mm_init(void)
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{
1816 decky 129
    pm_init();
1810 decky 130
 
131
    if (config.cpu_active == 1) {
1959 decky 132
        interrupt_init();
1810 decky 133
//      bios_init();
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    }
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}
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void arch_post_mm_init(void)
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{
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    if (config.cpu_active == 1) {
1959 decky 141
        /* Initialize IRQ routing */
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        irq_init(IRQ_COUNT, IRQ_COUNT);
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        /* Video */
1816 decky 145
        xen_console_init();
1959 decky 146
 
1810 decky 147
        /* Enable debugger */
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        debugger_init();
1959 decky 149
 
1810 decky 150
        /* Merge all memory zones to 1 big zone */
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        zone_merge_all();
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    }
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}
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1901 jermar 155
void arch_post_cpu_init(void)
156
{
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}
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1810 decky 159
void arch_pre_smp_init(void)
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{
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    if (config.cpu_active == 1) {
2107 jermar 162
#ifdef CONFIG_SMP
1810 decky 163
        acpi_init();
2107 jermar 164
#endif /* CONFIG_SMP */
1810 decky 165
    }
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}
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168
void arch_post_smp_init(void)
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{
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}
171
 
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void calibrate_delay_loop(void)
173
{
1816 decky 174
//  i8254_calibrate_delay_loop();
1810 decky 175
    if (config.cpu_active == 1) {
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        /*
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         * This has to be done only on UP.
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         * On SMP, i8254 is not used for time keeping and its interrupt pin remains masked.
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         */
1816 decky 180
//      i8254_normal_operation();
1810 decky 181
    }
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}
183
 
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/** Set thread-local-storage pointer
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 *
186
 * TLS pointer is set in GS register. That means, the GS contains
187
 * selector, and the descriptor->base is the correct address.
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 */
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unative_t sys_tls_set(unative_t addr)
190
{
191
    THREAD->arch.tls = addr;
192
    set_tls_desc(addr);
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194
    return 0;
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}
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/** Acquire console back for kernel
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 *
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 */
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void arch_grab_console(void)
201
{
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}
1816 decky 203
 
1810 decky 204
/** Return console to userspace
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 *
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 */
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void arch_release_console(void)
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{
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}
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2227 decky 211
void arch_reboot(void)
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{
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    // TODO
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    while (1);
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}
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1810 decky 217
/** @}
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 */