diff options
Diffstat (limited to 'c/src/lib/libbsp/mips/hurricane/startup/usc.S')
| -rw-r--r-- | c/src/lib/libbsp/mips/hurricane/startup/usc.S | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/c/src/lib/libbsp/mips/hurricane/startup/usc.S b/c/src/lib/libbsp/mips/hurricane/startup/usc.S deleted file mode 100644 index 887290e2a9..0000000000 --- a/c/src/lib/libbsp/mips/hurricane/startup/usc.S +++ /dev/null @@ -1,180 +0,0 @@ -/* usc.S - * - * COPYRIGHT (c) 1989-2010. - * On-Line Applications Research Corporation (OAR). - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#include <bspopts.h> -#include <rtems/asm.h> -#include <rtems/mips/iregdef.h> -#include <rtems/mips/idtcpu.h> -#if BSP_HAS_USC320 - #include <usc.h> -#endif - - -/*************************************************************************** -** -** The following code was added to support boards using V3 USC320 -** system controller chip. -** -****************************************************************************/ - -/************************************************************* -* init_hbt() -* Initialize the heartbeat timer -*/ -FRAME(init_hbt,sp,0,ra) - .set noreorder - la t0,SYSTEM # Unlock USC registers - li t1,0xA5 - sb t1,(t0) - - la t0,WD_HBI # Initialize heatbeat and watchdog timers - - # (1 / 64 MHz) * 4000 * (63 + 1) = 4000.0 microseconds - # Watchdog period is heartbeat period times watchdog timer constant (bits 7 - 0) - # Watchdog period = 4000 * 5 = 20000 microseconds - li t1,(WD_EN | HBI_4000_PS | 0x00003F00 | 0x5) - - # (1 / 64 MHz) * 4000 * (15 + 1) = 1000.0 microseconds - # Watchdog period is heartbeat period times watchdog timer constant (bits 7 - 0) - # Watchdog period = 1000 * 20 = 20000 microseconds - li t1,(WD_EN | HBI_4000_PS | 0x00000F00 | 0x14) - - # (1 / 64 MHz) * 40000 * (15 + 1) = 10000.0 microseconds - # Watchdog period is heartbeat period times watchdog timer constant (bits 7 - 0) - # Watchdog period = 10000 * 20 = 200000 microseconds - li t1,(WD_EN | HBI_4000_PS | 0x00009600 | 0x14) - - sw t1,(t0) - - la t0,SYSTEM # Lock USC registers - li t1,0x60 - sb t1,(t0) - - .set reorder - j ra - nop - .set reorder -ENDFRAME(init_hbt) - -/************************************************************* -* reset_wdt() -* Reset the watchdog timer -*/ -FRAME(reset_wdt,sp,0,ra) - .set noreorder - - la t0,WD_HBI+2 # Load address watchdog timer reset byte - li t1,WD_INIT - sb t1,(t0) - - .set reorder - j ra - nop - .set reorder -ENDFRAME(reset_wdt) - -/************************************************************* -* disable_wdt() -* Disable watchdog timer -*/ -FRAME(disable_wdt,sp,0,ra) - .set noreorder - la t0,WD_HBI # Clear watchdog enable bit in control register - lw t1,(t0) - li t2,~WD_EN - and t1,t1,t2 - sw t1,(t0) - - .set reorder - j ra - nop - .set reorder -ENDFRAME(disable_wdt) - -/************************************************************* -* enable_hbi(ints) -* Enable the heartbeat interrupt -*/ -FRAME(enable_hbi,sp,0,ra) - .set noreorder - - la t0,INT_CFG3 # Enable heartbeat interrupt in USC320 - lw t1,(t0) - li t2,(HBI_MASK | MODE_TOTEM_POLE) - or t1,t1,t2 - sw t1,(t0) - - .set reorder - j ra - nop - .set reorder -ENDFRAME(enable_hbi) - -/************************************************************* -* disable_hbi(ints) -* Disable the heartbeat interrupt -*/ -FRAME(disable_hbi,sp,0,ra) - .set noreorder - la t0,INT_CFG3 # Disable heartbeat interrupt in USC320 - lw t1,(t0) - li t2,~HBI_MASK - and t1,t1,t2 - sw t1,(t0) - - .set reorder - j ra - nop - .set reorder -ENDFRAME(disable_hbi) - - -/************************************************************* -* enable_wdi() -* Enable the watchdog interrupt -*/ -FRAME(enable_wdi,sp,0,ra) - .set noreorder - - la t0,INT_CFG1 # Enable watchdog interrupt in USC320 - lw t1,(t0) - li t2,(WDI_MASK | MODE_TOTEM_POLE) - or t1,t1,t2 - sw t1,(t0) - - .set reorder - j ra - nop - .set reorder -ENDFRAME(enable_wdi) - -/************************************************************* -* disable_wdi(ints) -* Disable the watchdog interrupt -*/ -FRAME(disable_wdi,sp,0,ra) - .set noreorder - - la t0,INT_CFG1 # Disable watchdog interrupt in USC320 - lw t1,(t0) - li t2,~(WDI_MASK | MODE_TOTEM_POLE) - and t1,t1,t2 - sw t1,(t0) - - la t0,INT_STAT # Clear watchdog interrupt status bit - li t1,WDI_MASK - sw t1,(t0) - - .set reorder - j ra - nop - .set reorder -ENDFRAME(disable_wdi) - |