27,9 → 27,15 |
# |
|
/** |
* This file contains two trap tables. First, trap_table, is the one |
* to wich kernel copies OFW's own trap table and patches it with |
* kernel-provided handlers from the second trap table, trap_table_kernel. |
* This file contains two trap tables. |
* First, trap_table, is the one wich contains handlers implemented by |
* kernel. During initialization, these handlers are copied out to |
* the second trap table, trap_table_save, and the first table is |
* overwritten with copy of OFW's own trap table. The copy is then patched |
* from the trap_table_save. |
* |
* This arrangement is beneficial because kernel handlers stay on their |
* link-time addresses which is good for debugging. |
*/ |
|
.text |
40,36 → 46,27 |
#define TABLE_SIZE TRAP_TABLE_SIZE |
#define ENTRY_SIZE TRAP_TABLE_ENTRY_SIZE |
|
|
/* |
* Trap table for copy of OFW's own trap table. |
* Kernel trap table. |
*/ |
.align TABLE_SIZE |
.global trap_table |
trap_table: |
.space TABLE_SIZE, 0 |
|
|
/* |
* Kernel-provided trap handlers. |
*/ |
.global trap_table_kernel |
trap_table_kernel: |
|
/* TT = 0x24, TL = 0 *, clean_window handler */ |
.org trap_table_kernel + TT_CLEAN_WINDOW*ENTRY_SIZE |
.org trap_table + TT_CLEAN_WINDOW*ENTRY_SIZE |
.global clean_window_handler |
clean_window_handler: |
CLEAN_WINDOW_HANDLER |
|
/* TT = 0x80, TL = 0 *, spill_0_normal handler */ |
.org trap_table_kernel + TT_SPILL_0_NORMAL*ENTRY_SIZE |
.org trap_table + TT_SPILL_0_NORMAL*ENTRY_SIZE |
.global spill_0_normal |
spill_0_normal: |
SPILL_NORMAL_HANDLER |
|
/* TT = 0xc0, TL = 0 *, fill_0_normal handler */ |
.org trap_table_kernel + TT_FILL_0_NORMAL*ENTRY_SIZE |
.org trap_table + TT_FILL_0_NORMAL*ENTRY_SIZE |
fill_0_normal: |
FILL_NORMAL_HANDLER |
|
76,31 → 73,39 |
/* |
* Software traps for TL=0. |
*/ |
.org trap_table_kernel + 256*ENTRY_SIZE |
.org trap_table + 256*ENTRY_SIZE |
tl_0_software_traps: |
|
/* Reserved area. */ |
.org trap_table_kernel + 384*ENTRY_SIZE |
.org trap_table + 384*ENTRY_SIZE |
.space 128*ENTRY_SIZE, 0 |
|
/* |
* Hardware interrupts for TL>0. |
*/ |
.org trap_table_kernel + 512*ENTRY_SIZE |
.org trap_table + 512*ENTRY_SIZE |
tl_non_0_hardware_traps: |
|
/* |
* Register window spill/fill traps for TL>0. |
*/ |
.org trap_table_kernel + 640*ENTRY_SIZE |
.org trap_table + 640*ENTRY_SIZE |
tl_non_0_regwin_traps: |
|
/* |
* Software traps for TL>0. |
*/ |
.org trap_table_kernel + 768*ENTRY_SIZE |
.org trap_table + 768*ENTRY_SIZE |
tl_non_0_software_traps: |
|
/* Reserved area. */ |
.org trap_table_kernel + 896*ENTRY_SIZE |
.org trap_table + 896*ENTRY_SIZE |
.space 128*ENTRY_SIZE, 0 |
|
|
/* |
* Save trap table. |
*/ |
.global trap_table_save |
trap_table_save: |
.space TABLE_SIZE, 0 |