//kernel/trunk/arch/amd64/include/ddi/ddi.h |
---|
0,0 → 1,39 |
/* |
* Copyright (C) 2006 Jakub Jermar |
* 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. |
*/ |
/** |
* @file ddi.h |
* @brief amd64 specific DDI declarations and macros. |
*/ |
#ifndef __amd64_DDI_H__ |
#define __amd64_DDI_H__ |
extern void io_perm_bitmap_install(void); |
#endif |
//kernel/trunk/arch/amd64/include/proc/task.h |
---|
34,7 → 34,8 |
#include <adt/bitmap.h> |
typedef struct { |
bitmap_t iomap; |
count_t iomapver; /**< I/O Permission bitmap Generation counter. */ |
bitmap_t iomap; /**< I/O Permission bitmap. */ |
} task_arch_t; |
#endif |
//kernel/trunk/arch/amd64/include/cpu.h |
---|
57,6 → 57,8 |
int model; |
int stepping; |
struct tss *tss; |
count_t iomapver_copy; /** Copy of TASK's I/O Permission bitmap generation count. */ |
}; |
struct star_msr { |
//kernel/trunk/arch/amd64/src/ddi/ddi.c |
---|
27,6 → 27,7 |
*/ |
#include <ddi/ddi.h> |
#include <arch/ddi/ddi.h> |
#include <proc/task.h> |
#include <arch/types.h> |
#include <typedefs.h> |
35,6 → 36,7 |
#include <arch/pm.h> |
#include <errno.h> |
#include <arch/cpu.h> |
#include <arch.h> |
/** Enable I/O space range for task. |
* |
89,6 → 91,11 |
*/ |
bitmap_clear_range(&task->arch.iomap, (index_t) ioaddr, (count_t) size); |
/* |
* Increment I/O Permission bitmap generation counter. |
*/ |
task->arch.iomapver++; |
return 0; |
} |
105,3 → 112,56 |
*flags &= ~RFLAGS_IF; |
return 0; |
} |
/** Install I/O Permission bitmap. |
* |
* Current task's I/O permission bitmap, if any, is installed |
* in the current CPU's TSS. |
* |
* Interrupts must be disabled prior this call. |
*/ |
void io_perm_bitmap_install(void) |
{ |
count_t bits; |
ptr_16_64_t cpugdtr; |
descriptor_t *gdt_p; |
tss_descriptor_t *tss_desc; |
count_t ver; |
/* First, copy the I/O Permission Bitmap. */ |
spinlock_lock(&TASK->lock); |
ver = TASK->arch.iomapver; |
if ((bits = TASK->arch.iomap.bits)) { |
bitmap_t iomap; |
ASSERT(TASK->arch.iomap.map); |
bitmap_initialize(&iomap, CPU->arch.tss->iomap, TSS_IOMAP_SIZE * 8); |
bitmap_copy(&iomap, &TASK->arch.iomap, TASK->arch.iomap.bits); |
/* |
* It is safe to set the trailing eight bits because of the extra |
* convenience byte in TSS_IOMAP_SIZE. |
*/ |
bitmap_set_range(&iomap, TASK->arch.iomap.bits, 8); |
} |
spinlock_unlock(&TASK->lock); |
/* Second, adjust TSS segment limit. */ |
gdtr_store(&cpugdtr); |
gdt_p = (descriptor_t *) cpugdtr.base; |
gdt_tss_setlimit(&gdt_p[TSS_DES], TSS_BASIC_SIZE + BITS2BYTES(bits) - 1); |
gdtr_load(&cpugdtr); |
/* |
* Before we load new TSS limit, the current TSS descriptor |
* type must be changed to describe inactive TSS. |
*/ |
tss_desc = (tss_descriptor_t *) &gdt_p[TSS_DES]; |
tss_desc->type = AR_TSS; |
tr_load(gdtselector(TSS_DES)); |
/* |
* Update the generation count so that faults caused by |
* early accesses can be serviced. |
*/ |
CPU->arch.iomapver_copy = ver; |
} |
//kernel/trunk/arch/amd64/src/proc/scheduler.c |
---|
36,7 → 36,7 |
#include <arch/debugger.h> |
#include <print.h> |
#include <arch/pm.h> |
#include <adt/bitmap.h> |
#include <arch/ddi/ddi.h> |
/** Perform amd64 specific tasks needed before the new task is run. |
* |
44,44 → 44,7 |
*/ |
void before_task_runs_arch(void) |
{ |
count_t bits; |
ptr_16_64_t cpugdtr; |
descriptor_t *gdt_p; |
tss_descriptor_t *tss_desc; |
/* |
* Switch the I/O Permission Bitmap, if necessary. |
*/ |
/* First, copy the I/O Permission Bitmap. */ |
spinlock_lock(&TASK->lock); |
if ((bits = TASK->arch.iomap.bits)) { |
bitmap_t iomap; |
ASSERT(TASK->arch.iomap.map); |
bitmap_initialize(&iomap, CPU->arch.tss->iomap, TSS_IOMAP_SIZE * 8); |
bitmap_copy(&iomap, &TASK->arch.iomap, TASK->arch.iomap.bits); |
/* |
* It is safe to set the trailing eight bits because of the extra |
* convenience byte in TSS_IOMAP_SIZE. |
*/ |
bitmap_set_range(&iomap, TASK->arch.iomap.bits, 8); |
} |
spinlock_unlock(&TASK->lock); |
/* Second, adjust TSS segment limit. */ |
gdtr_store(&cpugdtr); |
gdt_p = (descriptor_t *) cpugdtr.base; |
gdt_tss_setlimit(&gdt_p[TSS_DES], TSS_BASIC_SIZE + BITS2BYTES(bits) - 1); |
gdtr_load(&cpugdtr); |
/* |
* Before we load new TSS limit, the current TSS descriptor |
* type must be changed to describe inactive TSS. |
*/ |
tss_desc = (tss_descriptor_t *) &gdt_p[TSS_DES]; |
tss_desc->type = AR_TSS; |
tr_load(gdtselector(TSS_DES)); |
io_perm_bitmap_install(); |
} |
/** Perform amd64 specific tasks needed before the new thread is scheduled. */ |
//kernel/trunk/arch/amd64/src/interrupt.c |
---|
41,6 → 41,9 |
#include <arch/asm.h> |
#include <proc/scheduler.h> |
#include <proc/thread.h> |
#include <proc/task.h> |
#include <synch/spinlock.h> |
#include <arch/ddi/ddi.h> |
void print_info_errcode(int n, istate_t *istate) |
{ |
78,8 → 81,29 |
panic("unserviced interrupt\n"); |
} |
/** General Protection Fault. */ |
void gp_fault(int n, istate_t *istate) |
{ |
if (TASK) { |
count_t ver; |
spinlock_lock(&TASK->lock); |
ver = TASK->arch.iomapver; |
spinlock_unlock(&TASK->lock); |
if (CPU->arch.iomapver_copy != ver) { |
/* |
* This fault can be caused by an early access |
* to I/O port because of an out-dated |
* I/O Permission bitmap installed on CPU. |
* Install the fresh copy and restart |
* the instruction. |
*/ |
io_perm_bitmap_install(); |
return; |
} |
} |
print_info_errcode(n, istate); |
panic("general protection fault\n"); |
} |
//kernel/trunk/arch/ia32/include/ddi/ddi.h |
---|
0,0 → 1,39 |
/* |
* Copyright (C) 2006 Jakub Jermar |
* 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. |
*/ |
/** |
* @file ddi.h |
* @brief ia32 specific DDI declarations and macros. |
*/ |
#ifndef __ia32_DDI_H__ |
#define __ia32_DDI_H__ |
extern void io_perm_bitmap_install(void); |
#endif |
//kernel/trunk/arch/ia32/include/proc/task.h |
---|
34,7 → 34,8 |
#include <adt/bitmap.h> |
typedef struct { |
bitmap_t iomap; |
count_t iomapver; /**< I/O Permission bitmap Generation counter. */ |
bitmap_t iomap; /**< I/O Permission bitmap. */ |
} task_arch_t; |
#endif |
//kernel/trunk/arch/ia32/include/cpu.h |
---|
42,6 → 42,8 |
int model; |
int stepping; |
struct tss *tss; |
count_t iomapver_copy; /** Copy of TASK's I/O Permission bitmap generation count. */ |
}; |
//kernel/trunk/arch/ia32/src/ddi/ddi.c |
---|
27,6 → 27,7 |
*/ |
#include <ddi/ddi.h> |
#include <arch/ddi/ddi.h> |
#include <proc/task.h> |
#include <arch/types.h> |
#include <typedefs.h> |
35,6 → 36,8 |
#include <arch/pm.h> |
#include <errno.h> |
#include <arch/cpu.h> |
#include <cpu.h> |
#include <arch.h> |
/** Enable I/O space range for task. |
* |
89,6 → 92,11 |
*/ |
bitmap_clear_range(&task->arch.iomap, (index_t) ioaddr, (count_t) size); |
/* |
* Increment I/O Permission bitmap generation counter. |
*/ |
task->arch.iomapver++; |
return 0; |
} |
105,3 → 113,54 |
*flags &= ~EFLAGS_IF; |
return 0; |
} |
/** Install I/O Permission bitmap. |
* |
* Current task's I/O permission bitmap, if any, is installed |
* in the current CPU's TSS. |
* |
* Interrupts must be disabled prior this call. |
*/ |
void io_perm_bitmap_install(void) |
{ |
count_t bits; |
ptr_16_32_t cpugdtr; |
descriptor_t *gdt_p; |
count_t ver; |
/* First, copy the I/O Permission Bitmap. */ |
spinlock_lock(&TASK->lock); |
ver = TASK->arch.iomapver; |
if ((bits = TASK->arch.iomap.bits)) { |
bitmap_t iomap; |
ASSERT(TASK->arch.iomap.map); |
bitmap_initialize(&iomap, CPU->arch.tss->iomap, TSS_IOMAP_SIZE * 8); |
bitmap_copy(&iomap, &TASK->arch.iomap, TASK->arch.iomap.bits); |
/* |
* It is safe to set the trailing eight bits because of the extra |
* convenience byte in TSS_IOMAP_SIZE. |
*/ |
bitmap_set_range(&iomap, TASK->arch.iomap.bits, 8); |
} |
spinlock_unlock(&TASK->lock); |
/* Second, adjust TSS segment limit. */ |
gdtr_store(&cpugdtr); |
gdt_p = (descriptor_t *) cpugdtr.base; |
gdt_setlimit(&gdt_p[TSS_DES], TSS_BASIC_SIZE + BITS2BYTES(bits) - 1); |
gdtr_load(&cpugdtr); |
/* |
* Before we load new TSS limit, the current TSS descriptor |
* type must be changed to describe inactive TSS. |
*/ |
gdt_p[TSS_DES].access = AR_PRESENT | AR_TSS | DPL_KERNEL; |
tr_load(selector(TSS_DES)); |
/* |
* Update the generation count so that faults caused by |
* early accesses can be serviced. |
*/ |
CPU->arch.iomapver_copy = ver; |
} |
//kernel/trunk/arch/ia32/src/proc/scheduler.c |
---|
35,8 → 35,7 |
#include <arch/debugger.h> |
#include <arch/pm.h> |
#include <arch/asm.h> |
#include <adt/bitmap.h> |
#include <print.h> |
#include <arch/ddi/ddi.h> |
/** Perform ia32 specific tasks needed before the new task is run. |
* |
44,42 → 43,7 |
*/ |
void before_task_runs_arch(void) |
{ |
count_t bits; |
ptr_16_32_t cpugdtr; |
descriptor_t *gdt_p; |
/* |
* Switch the I/O Permission Bitmap, if necessary. |
*/ |
/* First, copy the I/O Permission Bitmap. */ |
spinlock_lock(&TASK->lock); |
if ((bits = TASK->arch.iomap.bits)) { |
bitmap_t iomap; |
ASSERT(TASK->arch.iomap.map); |
bitmap_initialize(&iomap, CPU->arch.tss->iomap, TSS_IOMAP_SIZE * 8); |
bitmap_copy(&iomap, &TASK->arch.iomap, TASK->arch.iomap.bits); |
/* |
* It is safe to set the trailing eight bits because of the extra |
* convenience byte in TSS_IOMAP_SIZE. |
*/ |
bitmap_set_range(&iomap, TASK->arch.iomap.bits, 8); |
} |
spinlock_unlock(&TASK->lock); |
/* Second, adjust TSS segment limit. */ |
gdtr_store(&cpugdtr); |
gdt_p = (descriptor_t *) cpugdtr.base; |
gdt_setlimit(&gdt_p[TSS_DES], TSS_BASIC_SIZE + BITS2BYTES(bits) - 1); |
gdtr_load(&cpugdtr); |
/* |
* Before we load new TSS limit, the current TSS descriptor |
* type must be changed to describe inactive TSS. |
*/ |
gdt_p[TSS_DES].access = AR_PRESENT | AR_TSS | DPL_KERNEL; |
tr_load(selector(TSS_DES)); |
io_perm_bitmap_install(); |
} |
/** Perform ia32 specific tasks needed before the new thread is scheduled. |
//kernel/trunk/arch/ia32/src/interrupt.c |
---|
40,6 → 40,9 |
#include <arch.h> |
#include <symtab.h> |
#include <proc/thread.h> |
#include <proc/task.h> |
#include <synch/spinlock.h> |
#include <arch/ddi/ddi.h> |
/* |
* Interrupt and exception dispatching. |
78,8 → 81,29 |
panic("unserviced interrupt: %d\n", n); |
} |
/** General Protection Fault. */ |
void gp_fault(int n, istate_t *istate) |
{ |
if (TASK) { |
count_t ver; |
spinlock_lock(&TASK->lock); |
ver = TASK->arch.iomapver; |
spinlock_unlock(&TASK->lock); |
if (CPU->arch.iomapver_copy != ver) { |
/* |
* This fault can be caused by an early access |
* to I/O port because of an out-dated |
* I/O Permission bitmap installed on CPU. |
* Install the fresh copy and restart |
* the instruction. |
*/ |
io_perm_bitmap_install(); |
return; |
} |
} |
PRINT_INFO_ERRCODE(istate); |
panic("general protection fault\n"); |
} |