| 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]; |
| } |
| } |