_start() now uses set_segment_descriptor() to initialize the GDT instead of
the direct values. Some cleanups. git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2369 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
parent
39c5004d20
commit
f143877df9
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@ -2,6 +2,8 @@
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** Copyright 2001, Travis Geiselbrecht. All rights reserved.
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** Distributed under the terms of the NewOS License.
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*/
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#include <stage2.h>
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#include <arch/x86/stage2_priv.h>
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@ -18,7 +20,9 @@ static unsigned int kernel_entry_point = 0;
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static int smp_get_current_cpu(kernel_args *ka);
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static unsigned int map_page(kernel_args *ka, unsigned int paddr, unsigned int vaddr)
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static unsigned int
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map_page(kernel_args *ka, unsigned int paddr, unsigned int vaddr)
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{
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unsigned int *pentry;
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unsigned int *pgdir = (unsigned int *)(ka->arch_args.page_hole + (4*1024*1024-PAGE_SIZE));
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@ -47,28 +51,37 @@ static unsigned int map_page(kernel_args *ka, unsigned int paddr, unsigned int v
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return 0;
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}
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static unsigned int apic_read(unsigned int *addr)
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static unsigned int
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apic_read(unsigned int *addr)
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{
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return *addr;
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}
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static void apic_write(unsigned int *addr, unsigned int data)
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static void
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apic_write(unsigned int *addr, unsigned int data)
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{
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*addr = data;
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}
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/*
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static void *mp_virt_to_phys(void *ptr)
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static void *
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mp_virt_to_phys(void *ptr)
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{
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return ((void *)(((unsigned int)ptr - mp_mem_virt) + mp_mem_phys));
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}
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*/
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static void *mp_phys_to_virt(void *ptr)
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static void *
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mp_phys_to_virt(void *ptr)
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{
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return ((void *)(((unsigned int)ptr - mp_mem_phys) + mp_mem_virt));
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}
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static unsigned int *smp_probe(unsigned int base, unsigned int limit)
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static unsigned int *
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smp_probe(unsigned int base, unsigned int limit)
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{
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unsigned int *ptr;
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@ -83,7 +96,9 @@ static unsigned int *smp_probe(unsigned int base, unsigned int limit)
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return NULL;
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}
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static void smp_do_config(kernel_args *ka)
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static void
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smp_do_config(kernel_args *ka)
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{
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char *ptr;
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int i;
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@ -168,6 +183,7 @@ static void smp_do_config(kernel_args *ka)
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}
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}
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struct smp_scan_spots_struct {
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unsigned int start;
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unsigned int stop;
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@ -180,7 +196,9 @@ static struct smp_scan_spots_struct smp_scan_spots[] = {
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{ 0, 0, 0 }
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};
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static int smp_find_mp_config(kernel_args *ka)
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static int
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smp_find_mp_config(kernel_args *ka)
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{
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int i;
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@ -231,7 +249,9 @@ static int smp_find_mp_config(kernel_args *ka)
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}
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}
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static int smp_setup_apic(kernel_args *ka)
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static int
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smp_setup_apic(kernel_args *ka)
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{
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unsigned int config;
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// dprintf("setting up the apic...");
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@ -278,12 +298,15 @@ static int smp_setup_apic(kernel_args *ka)
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return 0;
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}
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// target function of the trampoline code
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// The trampoline code should have the pgdir and a gdt set up for us,
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// along with us being on the final stack for this processor. We need
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// to set up the local APIC and load the global idt and gdt. When we're
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// done, we'll jump into the kernel with the cpu number as an argument.
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static int smp_cpu_ready(void)
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static int
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smp_cpu_ready(void)
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{
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kernel_args *ka = saved_ka;
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unsigned int curr_cpu = smp_get_current_cpu(ka);
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@ -324,7 +347,9 @@ static int smp_cpu_ready(void)
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return 0;
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}
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static int smp_boot_all_cpus(kernel_args *ka)
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static int
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smp_boot_all_cpus(kernel_args *ka)
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{
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unsigned int trampoline_code;
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unsigned int trampoline_stack;
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@ -438,7 +463,9 @@ static int smp_boot_all_cpus(kernel_args *ka)
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return 0;
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}
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static void calculate_apic_timer_conversion_factor(kernel_args *ka)
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static void
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calculate_apic_timer_conversion_factor(kernel_args *ka)
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{
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long long t1, t2;
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unsigned int config;
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@ -467,7 +494,9 @@ static void calculate_apic_timer_conversion_factor(kernel_args *ka)
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dprintf("APIC ticks/sec = %d\n", ka->arch_args.apic_time_cv_factor);
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}
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int smp_boot(kernel_args *ka, unsigned int kernel_entry)
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int
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smp_boot(kernel_args *ka, unsigned int kernel_entry)
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{
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// dprintf("smp_boot: entry\n");
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@ -509,10 +538,12 @@ int smp_boot(kernel_args *ka, unsigned int kernel_entry)
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return 0;
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}
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static int smp_get_current_cpu(kernel_args *ka)
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static int
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smp_get_current_cpu(kernel_args *ka)
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{
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if (ka->arch_args.apic == NULL)
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return 0;
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else
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return ka->arch_args.cpu_os_id[(apic_read(APIC_ID) & 0xffffffff) >> 24];
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}
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@ -6,6 +6,7 @@
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#include <bootdir.h>
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#include <stage2.h>
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#include "arch/x86/stage2_priv.h"
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#include "arch/x86/descriptors.h"
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#include "vesa.h"
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#include <string.h>
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@ -69,7 +70,7 @@ void
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_start(unsigned int mem, int in_vesa, unsigned int vesa_ptr)
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{
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unsigned int *idt;
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unsigned int *gdt;
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segment_descriptor *gdt;
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unsigned int next_vaddr;
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unsigned int next_paddr;
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unsigned int i;
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@ -186,24 +187,26 @@ _start(unsigned int mem, int in_vesa, unsigned int vesa_ptr)
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struct gdt_idt_descr gdt_descr;
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// find a new gdt
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gdt = (unsigned int *)next_paddr;
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gdt = (segment_descriptor *)next_paddr;
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ka->arch_args.phys_gdt = (unsigned int)gdt;
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next_paddr += PAGE_SIZE;
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MESSAGE(("gdt at ", (unsigned int)gdt, "\n"));
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// put segment descriptors in it
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gdt[0] = 0;
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gdt[1] = 0;
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gdt[2] = 0x0000ffff; // seg 0x8 -- kernel 4GB code
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gdt[3] = 0x00cf9a00;
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gdt[4] = 0x0000ffff; // seg 0x10 -- kernel 4GB data
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gdt[5] = 0x00cf9200;
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gdt[6] = 0x0000ffff; // seg 0x1b -- ring 3 4GB code
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gdt[7] = 0x00cffa00;
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gdt[8] = 0x0000ffff; // seg 0x23 -- ring 3 4GB data
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gdt[9] = 0x00cff200;
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// gdt[10] & gdt[11] will be filled later by the kernel
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// put standard segment descriptors in it
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clear_segment_descriptor(&gdt[0]);
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set_segment_descriptor(&gdt[1], 0, 0xfffff, DT_CODE_READABLE, DPL_KERNEL);
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// seg 0x10 - kernel 4GB code
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set_segment_descriptor(&gdt[2], 0, 0xfffff, DT_DATA_WRITEABLE, DPL_KERNEL);
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// seg 0x10 - kernel 4GB data
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set_segment_descriptor(&gdt[3], 0, 0xfffff, DT_CODE_READABLE, DPL_USER);
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// seg 0x1b - ring 3 user 4GB code
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set_segment_descriptor(&gdt[4], 0, 0xfffff, DT_DATA_WRITEABLE, DPL_USER);
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// seg 0x23 - ring 3 user 4GB data
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// gdt[5] and above will be filled later by the kernel
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// to contain the TSS descriptors, and for TLS (one for every CPU)
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// map the gdt into virtual space
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mmu_map_page(next_vaddr, (unsigned int)gdt);
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