28,8 → 28,12 |
|
#include <arch/trap/trap.h> |
#include <arch/trap/trap_table.h> |
#include <arch/trap/regwin.h> |
#include <arch/asm.h> |
#include <memstr.h> |
#include <debug.h> |
#include <arch/types.h> |
#include <typedefs.h> |
|
/** Initialize trap table. */ |
void trap_init(void) |
38,4 → 42,37 |
* Copy OFW's trap table into kernel. |
*/ |
memcpy((void *) trap_table, (void *) tba_read(), TRAP_TABLE_SIZE); |
|
/* |
* Install kernel-provided handlers. |
*/ |
trap_install_handler(TT_CLEAN_WINDOW, CLEAN_WINDOW_HANDLER_SIZE, false); |
trap_install_handler(TT_SPILL_0_NORMAL, SPILL_HANDLER_SIZE, false); |
trap_install_handler(TT_FILL_0_NORMAL, FILL_HANDLER_SIZE, false); |
} |
|
/** Copy trap handler to active trap table. |
* |
* The handler is copied from trap_table_kernel to trap_handler. |
* |
* @param tt Trap type. An index that uniquelly identifies handler code. |
* @param len Length of the handler in bytes. Must be multiple of TRAP_TABLE_ENTRY_SIZE (i.e. 32). |
* @param tlnonz If false, tt is considered from the lower half of trap table. If true, the upper half is chosen. |
*/ |
void trap_install_handler(index_t tt, size_t len, bool tlnonz) |
{ |
count_t cnt; |
int i; |
|
ASSERT(tt < TRAP_TABLE_ENTRY_COUNT/2); |
ASSERT(len % TRAP_TABLE_ENTRY_SIZE == 0); |
|
if (tlnonz) |
tt += TRAP_TABLE_ENTRY_COUNT/2; |
|
cnt = len/TRAP_TABLE_ENTRY_SIZE; |
|
for (i = tt; i < tt + cnt; i++) { |
trap_table[i] = trap_table_kernel[i]; |
} |
} |