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();
}
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_error ia32_region_release(i_as asid,
i_region regid)
{
REGION_ENTER(region);
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_vsize size;
t_paddr base;
t_vaddr pd_addr;
t_paddr pt_addr;
o_region* oreg;
int i = 0;
int j = 0;
t_ia32_pte* t;
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);
size = oreg->size;
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)
{
map_page(table.entries, &pt_addr);
table.entries = pt_addr;
}
for (j = (i == pde_start ? pte_start : 0); j <= (i == pde_end ? pte_end : 1023); j++)
{
t = (t_ia32_pte*)table.entries;
if (t[j] != 0)
if (pt_delete_page(&table, j) != ERROR_NONE)
REGION_LEAVE(region, ERROR_UNKNOWN);
}
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();
}
