t_status architecture_environment_server(i_as id)
{
i_segment segment;
i_region region;
o_as* as;
at_pd pd;
o_region* r;
o_segment* s;
/*
* 1)
*/
if (as_get(id, &as) != STATUS_OK)
MACHINE_ESCAPE("unable to retrieve the address space object");
/*
* 2)
*/
if (segment_reserve(as->id,
___kaneton$pagesz,
PERMISSION_READ | PERMISSION_WRITE,
SEGMENT_OPTION_SYSTEM,
&segment) != STATUS_OK)
MACHINE_ESCAPE("unable to reserve a segment");
if (segment_get(segment, &s) != STATUS_OK)
MACHINE_ESCAPE("unable to retrieve the segment object");
/*
* 3)
*/
as->machine.pd = s->address;
/*
* 4)
*/
if (architecture_pd_map(as->machine.pd, &pd) != STATUS_OK)
MACHINE_ESCAPE("unable to map the page directory");
if (architecture_pd_build(pd) != STATUS_OK)
MACHINE_ESCAPE("unable to build the page directory");
if (architecture_pd_unmap(pd) != STATUS_OK)
MACHINE_ESCAPE("unable to unmap the page directory");
/*
* 5)
*/
if (region_locate(_kernel.as,
_thread.machine.tss,
®ion) == FALSE)
MACHINE_ESCAPE("unable to locate the region in which the TSS lies");
if (region_get(_kernel.as, region, &r) != STATUS_OK)
MACHINE_ESCAPE("unable to retrieve the region object");
if (region_reserve(as->id,
r->segment,
0x0,
REGION_OPTION_FORCE |
REGION_OPTION_NONE,
_thread.machine.tss,
r->size,
®ion) != STATUS_OK)
MACHINE_ESCAPE("unable to reserve the region mapping the TSS");
/*
* 6)
*/
if (region_locate(_kernel.as,
(t_vaddr)_segment.machine.gdt.table,
®ion) == FALSE)
MACHINE_ESCAPE("unable to locate the region in which the GDT lies");
if (region_get(_kernel.as, region, &r) != STATUS_OK)
MACHINE_ESCAPE("unable to retrieve the region object");
if (region_reserve(as->id,
r->segment,
0x0,
REGION_OPTION_FORCE |
REGION_OPTION_NONE,
(t_vaddr)_segment.machine.gdt.table,
___kaneton$pagesz,
®ion) != STATUS_OK)
MACHINE_ESCAPE("unable to reserve the region mapping the GDT");
/*
* 7)
*/
if (region_locate(_kernel.as,
(t_vaddr)_event.machine.idt.table,
®ion) == FALSE)
MACHINE_ESCAPE("unable to locate the region in which the IDT lies");
if (region_get(_kernel.as, region, &r) != STATUS_OK)
MACHINE_ESCAPE("unable to retrieve the region object");
if (region_reserve(as->id,
r->segment,
0x0,
REGION_OPTION_FORCE |
REGION_OPTION_NONE,
(t_vaddr)_event.machine.idt.table,
___kaneton$pagesz,
®ion) != STATUS_OK)
MACHINE_ESCAPE("unable to reserve the region mapping the IDT");
/*
* 8)
*/
if (region_reserve(as->id,
_init->kcode,
ARCHITECTURE_LINKER_SYMBOL(_handler_code_begin) -
_init->kcode,
REGION_OPTION_FORCE,
ARCHITECTURE_LINKER_SYMBOL(_handler_code_begin),
ARCHITECTURE_LINKER_SYMBOL(_handler_code_end) -
ARCHITECTURE_LINKER_SYMBOL(_handler_code_begin),
®ion) != STATUS_OK)
MACHINE_ESCAPE("unable to map the handler code section");
/*
* 9)
*/
if (region_reserve(as->id,
_init->kcode,
ARCHITECTURE_LINKER_SYMBOL(_handler_data_begin) -
_init->kcode,
REGION_OPTION_FORCE,
ARCHITECTURE_LINKER_SYMBOL(_handler_data_begin),
ARCHITECTURE_LINKER_SYMBOL(_handler_data_end) -
ARCHITECTURE_LINKER_SYMBOL(_handler_data_begin),
®ion) != STATUS_OK)
MACHINE_ESCAPE("unable to map the handler data section");
MACHINE_LEAVE();
}
// FIXME: lot of code has been removed here
t_error map_page(t_paddr paddr, t_vaddr *vaddr)
{
o_as* kas;
t_ia32_pde pde;
t_ia32_pde pte;
t_ia32_directory dir;
t_ia32_table table;
t_ia32_page page;
o_region* oreg;
i_segment segid;
o_segment* segment;
int clear = 0;
REGION_ENTER(region);
if (as_get(kasid, &kas) != ERROR_NONE)
REGION_LEAVE(region, ERROR_UNKNOWN);
if (region_space(kas, PAGESZ, vaddr) != ERROR_NONE)
REGION_LEAVE(region, ERROR_UNKNOWN);
if ((oreg = malloc(sizeof(o_region))) == NULL)
REGION_LEAVE(region, ERROR_UNKNOWN);
oreg->address = *vaddr;
oreg->regid = (i_region)oreg->address;
oreg->opts = REGION_OPT_PRIVILEGED;
oreg->size = PAGESZ;
oreg->offset = 0;
oreg->segid = (i_segment) paddr;
if (region_inject(kasid, oreg) != ERROR_NONE)
REGION_LEAVE(region, ERROR_UNKNOWN);
// Page Dir
dir = kas->machdep.pd;
pde = PDE_ENTRY(*vaddr);
if (pd_get_table(&dir, pde, &table) == ERROR_UNKNOWN)
{
segment_reserve(kasid, PAGESZ, PERM_READ | PERM_WRITE, &segid);
if (segment_get(segid, &segment) != ERROR_NONE)
REGION_LEAVE(region, ERROR_UNKNOWN);
table.rw = PT_WRITABLE;
pt_build(segment->address, &table, 0);
pd_add_table(&dir, pde, table);
clear = 1;
}
table.entries = ENTRY_ADDR(PD_MIRROR, pde);
//fixme
if (clear)
memset((void *)ENTRY_ADDR(PD_MIRROR, pde), '\0', PAGESZ);
// Page Table
pte = PTE_ENTRY(*vaddr);
page.present = 1;
page.addr = paddr;
page.rw = PG_WRITABLE;
pt_add_page(&table, pte, page);
tlb_invalidate(*vaddr);
REGION_LEAVE(region, ERROR_NONE);
}
void test_core_as_copy_01(void)
{
i_task task1;
i_task task2;
i_as as1;
i_as as2;
i_segment seg1;
i_segment seg2;
i_segment seg3;
i_segment seg4;
i_segment seg5;
i_segment seg6;
i_segment useless;
i_region reg;
t_uint32 i;
t_uint8 buff[4 * ___kaneton$pagesz];
TEST_ENTER();
/*
* first address space
*/
if (task_reserve(TASK_CLASS_GUEST,
TASK_BEHAVIOUR_INTERACTIVE,
TASK_PRIORITY_INTERACTIVE,
&task1) != STATUS_OK)
TEST_ERROR("[task_reserve] error");
if (as_reserve(task1, &as1) != STATUS_OK)
TEST_ERROR("[as_reserve] error");
if (segment_reserve(as1,
2 * ___kaneton$pagesz,
PERMISSION_READ | PERMISSION_WRITE,
SEGMENT_OPTION_NONE,
&seg1) != STATUS_OK)
TEST_ERROR("[segment_reserve] error");
if (segment_reserve(as1,
___kaneton$pagesz,
PERMISSION_READ | PERMISSION_WRITE,
SEGMENT_OPTION_NONE,
&useless) != STATUS_OK)
TEST_ERROR("[segment_reserve] error");
if (segment_reserve(as1,
4 * ___kaneton$pagesz,
PERMISSION_READ | PERMISSION_WRITE,
SEGMENT_OPTION_NONE,
&seg2) != STATUS_OK)
TEST_ERROR("[segment_reserve] error");
if (segment_reserve(as1,
___kaneton$pagesz,
PERMISSION_READ | PERMISSION_WRITE,
SEGMENT_OPTION_NONE,
&useless) != STATUS_OK)
TEST_ERROR("[segment_reserve] error");
if (segment_reserve(as1,
2 * ___kaneton$pagesz,
PERMISSION_READ | PERMISSION_WRITE,
SEGMENT_OPTION_NONE,
&seg3) != STATUS_OK)
TEST_ERROR("[segment_reserve] error");
if (region_reserve(as1,
seg1,
___kaneton$pagesz,
REGION_OPTION_FORCE,
0x20000000,
___kaneton$pagesz,
®) != STATUS_OK)
TEST_ERROR("[region_reserve] error");
if (region_reserve(as1,
seg2,
___kaneton$pagesz,
REGION_OPTION_FORCE,
0x20001000,
2 * ___kaneton$pagesz,
®) != STATUS_OK)
TEST_ERROR("[region_reserve] error");
if (region_reserve(as1,
seg3,
0,
REGION_OPTION_FORCE,
0x20003000,
___kaneton$pagesz,
®) != STATUS_OK)
TEST_ERROR("[region_reserve] error");
/*
* second address space
*/
if (task_reserve(TASK_CLASS_GUEST,
TASK_BEHAVIOUR_INTERACTIVE,
TASK_PRIORITY_INTERACTIVE,
&task2) != STATUS_OK)
TEST_ERROR("[task_reserve] error");
if (as_reserve(task2, &as2) != STATUS_OK)
TEST_ERROR("[as_reserve] error");
if (segment_reserve(as2,
2 * ___kaneton$pagesz,
PERMISSION_READ | PERMISSION_WRITE,
SEGMENT_OPTION_NONE,
&seg4) != STATUS_OK)
TEST_ERROR("[segment_reserve] error");
if (segment_reserve(as2,
___kaneton$pagesz,
PERMISSION_READ | PERMISSION_WRITE,
SEGMENT_OPTION_NONE,
&useless) != STATUS_OK)
TEST_ERROR("[segment_reserve] error");
if (segment_reserve(as2,
4 * ___kaneton$pagesz,
PERMISSION_READ | PERMISSION_WRITE,
SEGMENT_OPTION_NONE,
&seg5) != STATUS_OK)
TEST_ERROR("[segment_reserve] error");
if (segment_reserve(as2,
___kaneton$pagesz,
PERMISSION_READ | PERMISSION_WRITE,
SEGMENT_OPTION_NONE,
&useless) != STATUS_OK)
TEST_ERROR("[segment_reserve] error");
if (segment_reserve(as2,
2 * ___kaneton$pagesz,
PERMISSION_READ | PERMISSION_WRITE,
SEGMENT_OPTION_NONE,
&seg6) != STATUS_OK)
TEST_ERROR("[segment_reserve] error");
if (region_reserve(as2,
seg4,
0,
REGION_OPTION_FORCE,
0x40000000,
___kaneton$pagesz,
®) != STATUS_OK)
TEST_ERROR("[region_reserve] error");
if (region_reserve(as2,
seg5,
2 * ___kaneton$pagesz,
REGION_OPTION_FORCE,
0x40001000,
___kaneton$pagesz,
®) != STATUS_OK)
TEST_ERROR("[region_reserve] error");
if (region_reserve(as2,
seg6,
0,
REGION_OPTION_FORCE,
0x40002000,
2 * ___kaneton$pagesz,
®) != STATUS_OK)
TEST_ERROR("[region_reserve] error");
/*
* operations
*/
for (i = 0; i < 4 * ___kaneton$pagesz; i++)
buff[i] = (i * 2 + 4) % 256;
if (as_write(as1, buff, 4 * ___kaneton$pagesz, 0x20000000) != STATUS_OK)
TEST_ERROR("[as_write] error");
for (i = 0; i < 4 * ___kaneton$pagesz; i++)
buff[i] = 0;
if (as_copy(as1, 0x20000000, as2, 0x40000000, 4 * ___kaneton$pagesz) != STATUS_OK)
TEST_ERROR("[as_copy] error");
if (as_read(as2, 0x40000000, 4 * ___kaneton$pagesz, buff) != STATUS_OK)
TEST_ERROR("[as_read] error");
for (i = 0; i < 4 * ___kaneton$pagesz; i++)
if (buff[i] != (i * 2 + 4) % 256)
TEST_ERROR("the data appears invalid once read from the "
"address space\n");
TEST_SIGNATURE(rr3fiw3w20aafi9gre9g);
TEST_LEAVE();
}
t_error ia32_region_reserve(i_as asid,
i_segment segid,
t_paddr offset,
t_opts opts,
t_vaddr address,
t_vsize size,
i_region* regid)
{
t_ia32_pde pde_start;
t_ia32_pde pde_end;
t_ia32_pte pte_start;
t_ia32_pte pte_end;
t_ia32_table table;
t_ia32_directory pd;
o_as* oas;
t_ia32_page page;
t_paddr base;
t_paddr ram_paddr;
t_vaddr pd_addr;
t_paddr pt_addr;
o_segment* oseg;
o_region* oreg;
int i = 0;
int j = 0;
int x = 0;
int clear = 0;
REGION_ENTER(region);
if (as_get(asid, &oas) != ERROR_NONE)
REGION_LEAVE(region, ERROR_UNKNOWN);
if (region_get(asid, *regid, &oreg) != ERROR_NONE)
REGION_LEAVE(region, ERROR_UNKNOWN);
if (segment_get(segid, &oseg) != ERROR_NONE)
REGION_LEAVE(region, ERROR_UNKNOWN);
ram_paddr = oseg->address;
pd = oas->machdep.pd;
base = MK_BASE(pd);
// Mapping PD into Kernel
map_page(base, &pd_addr);
/* printf("pd %x\n", pd_addr); */
/* printf("%x\n", oreg->address); */
pde_start = PDE_ENTRY(oreg->address);
pde_end = PDE_ENTRY(oreg->address + size);
pte_start = PTE_ENTRY(oreg->address);
pte_end = PTE_ENTRY(oreg->address + size);
for (i = pde_start; i <= pde_end; i++)
{
if (pd_get_table((t_ia32_directory *) &pd_addr, i, &table) == ERROR_UNKNOWN)
{
segment_reserve(asid, PAGESZ, PERM_READ | PERM_WRITE, &segid);
if (segment_get(segid, &oseg) != ERROR_NONE)
REGION_LEAVE(region, ERROR_UNKNOWN);
table.rw = PDE_FLAG_RW;
table.present = 1;
table.user = (opts & REGION_OPT_USER) ? PT_USER : PT_PRIVILEGED;
table.writeback = PT_CACHED;
table.cached = 1;
pt_build(oseg->address, &table, 0);
pd_add_table((t_ia32_directory *) &pd_addr, i, table);
clear = 1;
}
else
clear = 0;
map_page(table.entries, &pt_addr);
table.entries = pt_addr;
if (clear)
memset((void*)pt_addr, '\0', PAGESZ);
for (j = (i == pde_start ? pte_start : 0); j <= (i == pde_end ? pte_end : 1023); j++)
{
page.addr = x + (offset + ram_paddr);
page.present = 1;
page.rw = (oseg->perms & PERM_WRITE) ? PG_WRITABLE : PG_READONLY;
page.present = 1;
page.user = (opts & REGION_OPT_USER) ? PG_USER : PG_PRIVILEGED;
page.cached = PG_CACHED;
pt_add_page(&table, j, page);
x += PAGESZ;
}
unmap_page(&pt_addr);
}
tlb_flush();
unmap_page(&pd_addr);
REGION_LEAVE(region, ERROR_NONE);
}
t_status architecture_handler_setup(void)
{
t_uint16 selector;
i_segment segment;
i_region region;
as_idt idt;
o_region* o;
t_uint32 i;
/*
* 1)
*/
if (segment_reserve(_kernel.as,
___kaneton$pagesz,
PERMISSION_READ | PERMISSION_WRITE,
SEGMENT_OPTION_SYSTEM,
&segment) != STATUS_OK)
MACHINE_ESCAPE("unable to reserve a segment");
if (region_reserve(_kernel.as,
segment,
0x0,
REGION_OPTION_NONE,
0x0,
___kaneton$pagesz,
®ion) != STATUS_OK)
MACHINE_ESCAPE("unable to reserve a region for the segment");
if (region_get(_kernel.as, region, &o) != STATUS_OK)
MACHINE_ESCAPE("unable to retrieve the region object");
/*
* 2)
*/
if (architecture_idt_build(o->address,
ARCHITECTURE_IDT_SIZE,
&idt) != STATUS_OK)
MACHINE_ESCAPE("unable to build the IDT at the given address");
if (architecture_idt_import(&idt) != STATUS_OK)
MACHINE_ESCAPE("unable to import the built IDT");
/*
* 3)
*/
if (architecture_gdt_selector(ARCHITECTURE_GDT_INDEX_KERNEL_CODE,
ARCHITECTURE_PRIVILEGE_KERNEL,
&selector) != STATUS_OK)
MACHINE_ESCAPE("unable to build the kernel code segment selector");
/*
* 4)
*/
for (i = ARCHITECTURE_IDT_EXCEPTION_BASE;
i < ARCHITECTURE_IDT_EXCEPTION_BASE + ARCHITECTURE_IDT_EXCEPTION_SIZE;
i++)
{
if (architecture_idt_insert(i,
(t_vaddr)_architecture_handler_shells[i],
selector,
ARCHITECTURE_IDTE_DPL_SET(
ARCHITECTURE_PRIVILEGE_RING0) |
ARCHITECTURE_IDTE_32BIT |
ARCHITECTURE_IDTE_INTERRUPT) != STATUS_OK)
MACHINE_ESCAPE("unable to register the exception handler '%u'",
i);
}
/*
* 5)
*/
for (i = ARCHITECTURE_IDT_IRQ_BASE;
i < ARCHITECTURE_IDT_IRQ_BASE + ARCHITECTURE_IDT_IRQ_SIZE;
i++)
{
if (architecture_idt_insert(i,
(t_vaddr)_architecture_handler_shells[i],
selector,
ARCHITECTURE_IDTE_DPL_SET(
ARCHITECTURE_PRIVILEGE_RING0) |
ARCHITECTURE_IDTE_32BIT |
ARCHITECTURE_IDTE_INTERRUPT) != STATUS_OK)
MACHINE_ESCAPE("unable to register the exception handler '%u'",
i);
}
/*
* 6)
*/
for (i = ARCHITECTURE_IDT_SYSCALL_BASE;
i < ARCHITECTURE_IDT_SYSCALL_BASE + ARCHITECTURE_IDT_SYSCALL_SIZE;
i++)
{
if (architecture_idt_insert(i,
(t_vaddr)_architecture_handler_shells[i],
selector,
ARCHITECTURE_IDTE_DPL_SET(
ARCHITECTURE_PRIVILEGE_RING3) |
ARCHITECTURE_IDTE_32BIT |
ARCHITECTURE_IDTE_INTERRUPT) != STATUS_OK)
MACHINE_ESCAPE("unable to register the exception handler '%u'",
i);
}
MACHINE_LEAVE();
}
