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sel4: test the use of memory mappings

This commit is contained in:
Norman Feske 2015-02-11 15:40:03 +01:00 committed by Christian Helmuth
parent 58481fe35d
commit 9bf7a240fc
1 changed files with 139 additions and 2 deletions
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141
repos/base-sel4/src/test/sel4/main.cc
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@ -68,8 +68,10 @@ static inline void init_ipc_buffer()
}
enum { SEL4_TCB_SIZE = 0x1000,
SEL4_EP_SIZE = 16 };
enum { SEL4_TCB_SIZE = 0x1000,
SEL4_EP_SIZE = 16,
SEL4_PAGE_TABLE_SIZE = 1UL << 12,
SEL4_PAGE_SIZE = 1UL << 12 };
/*
* Capability for the second thread's TCB
@ -92,6 +94,12 @@ enum { RECV_CAP = 0x102 };
*/
enum { EP_MINTED_CAP = 0x103 };
/*
* Capabilities for a custom created page table, a page, and a second cap
* for the same page.
*/
enum { PAGE_TABLE_CAP = 0x104, PAGE_CAP = 0x105, PAGE_CAP_2 = 0x106 };
void second_thread_entry()
{
@ -320,6 +328,135 @@ int main()
PDBG("returned from seL4_Call");
}
/*
* Test the mapping of memory
*/
/* create page table */
{
/* align allocation offset */
untyped_offset = Genode::align_addr(untyped_offset, 12);
seL4_Untyped const service = untyped;
int const type = seL4_IA32_PageTableObject;
int const offset = untyped_offset;
int const size_bits = 0;
seL4_CNode const root = seL4_CapInitThreadCNode;
int const node_index = 0;
int const node_depth = 0;
int const node_offset = PAGE_TABLE_CAP;
int const num_objects = 1;
untyped_offset += SEL4_PAGE_TABLE_SIZE;
int const ret = seL4_Untyped_RetypeAtOffset(service,
type,
offset,
size_bits,
root,
node_index,
node_depth,
node_offset,
num_objects);
PDBG("seL4_Untyped_RetypeAtOffset (PAGE_TABLE) returned %d", ret);
}
/* create 4K page */
{
/* align allocation offset */
untyped_offset = Genode::align_addr(untyped_offset, 12);
seL4_Untyped const service = untyped;
int const type = seL4_IA32_4K;
int const offset = untyped_offset;
int const size_bits = 0;
seL4_CNode const root = seL4_CapInitThreadCNode;
int const node_index = 0;
int const node_depth = 0;
int const node_offset = PAGE_CAP;
int const num_objects = 1;
untyped_offset += SEL4_PAGE_SIZE;
int const ret = seL4_Untyped_RetypeAtOffset(service,
type,
offset,
size_bits,
root,
node_index,
node_depth,
node_offset,
num_objects);
PDBG("seL4_Untyped_RetypeAtOffset (PAGE) returned %d", ret);
}
/* add page table into our page directory at address 0x40000000 */
{
seL4_IA32_PageTable const service = PAGE_TABLE_CAP;
seL4_IA32_PageDirectory const pd = seL4_CapInitThreadPD;
seL4_Word const vaddr = 0x40000000;
seL4_IA32_VMAttributes const attr = seL4_IA32_Default_VMAttributes;
int const ret = seL4_IA32_PageTable_Map(service, pd, vaddr, attr);
PDBG("seL4_IA32_PageTable_Map returned %d", ret);
}
/* add page to page table at 0x40001000 */
{
seL4_IA32_Page const service = PAGE_CAP;
seL4_IA32_PageDirectory const pd = seL4_CapInitThreadPD;
seL4_Word const vaddr = 0x40001000;
seL4_CapRights const rights = seL4_AllRights;
seL4_IA32_VMAttributes const attr = seL4_IA32_Default_VMAttributes;
int const ret = seL4_IA32_Page_Map(service, pd, vaddr, rights, attr);
PDBG("seL4_IA32_Page_Map to 0x%lx returned %d", (unsigned long)vaddr, ret);
}
/*
* We cannot use the same PAGE_CAP for the seoncd mapping (see Chapter
* 6.4 of the seL4 manual). So we need to create and use a copy of the
* page cap.
*/
{
seL4_CNode const service = seL4_CapInitThreadCNode;
seL4_Word const dest_index = PAGE_CAP_2;
uint8_t const dest_depth = 32;
seL4_CNode const src_root = seL4_CapInitThreadCNode;
seL4_Word const src_index = PAGE_CAP;
uint8_t const src_depth = 32;
seL4_CapRights const rights = seL4_AllRights;
int const ret = seL4_CNode_Copy(service, dest_index, dest_depth,
src_root, src_index, src_depth, rights);
PDBG("seL4_CNode_Copy returned %d", ret);
}
/* add the same page to page table at 0x40002000 */
{
seL4_IA32_Page const service = PAGE_CAP_2;
seL4_IA32_PageDirectory const pd = seL4_CapInitThreadPD;
seL4_Word const vaddr = 0x40002000;
seL4_CapRights const rights = seL4_AllRights;
seL4_IA32_VMAttributes const attr = seL4_IA32_Default_VMAttributes;
int const ret = seL4_IA32_Page_Map(service, pd, vaddr, rights, attr);
PDBG("seL4_IA32_Page_Map to 0x%lx returned %d", (unsigned long)vaddr, ret);
}
/* write data to the first mapping of the page */
Genode::strncpy((char *)0x40001000, "Data written to 0x40001000", 100);
/* print content of the second mapping */
PLOG("read from 0x40002000: \"%s\"", (char const *)0x40002000);
*(int *)0x1122 = 0;
return 0;
}