phone-side
/
nuttx-bb
9
0
Fork 0
Code Releases Activity

Add more context switching files 

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@3624 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo 2011-05-18 19:11:36 +00:00
parent b4c92f2e77
commit f00e9d8edf
9 changed files with 619 additions and 112 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

147
nuttx/arch/mips/include/mips32/irq.h
View File

@ -67,51 +67,52 @@
#define REG_MFLO_NDX 0
#define REG_MFHI_NDX 1
#define REG_EPC_NDX 2
#define REG_STATUS_NDX 3
/* General pupose registers */
/* $0: Zero register does not need to be saved */
/* $1: at_reg, assembler temporary */
#define REG_R1_NDX 3
#define REG_R1_NDX 4
/* $2-$3 = v0-v1: Return value registers */
#define REG_R2_NDX 4
#define REG_R3_NDX 5
#define REG_R2_NDX 5
#define REG_R3_NDX 6
/* $4-$7 = a0-a3: Argument registers */
#define REG_R4_NDX 6
#define REG_R5_NDX 7
#define REG_R6_NDX 8
#define REG_R7_NDX 9
#define REG_R4_NDX 7
#define REG_R5_NDX 8
#define REG_R6_NDX 9
#define REG_R7_NDX 10
/* $8-$15 = t0-t7: Volatile registers */
#define REG_R8_NDX 10
#define REG_R9_NDX 11
#define REG_R10_NDX 12
#define REG_R11_NDX 13
#define REG_R12_NDX 14
#define REG_R13_NDX 15
#define REG_R14_NDX 16
#define REG_R15_NDX 17
#define REG_R8_NDX 11
#define REG_R9_NDX 12
#define REG_R10_NDX 13
#define REG_R11_NDX 14
#define REG_R12_NDX 15
#define REG_R13_NDX 16
#define REG_R14_NDX 17
#define REG_R15_NDX 18
/* $16-$23 = s0-s7: Static registers */
#define REG_R16_NDX 18
#define REG_R17_NDX 19
#define REG_R18_NDX 20
#define REG_R19_NDX 21
#define REG_R20_NDX 22
#define REG_R21_NDX 23
#define REG_R22_NDX 24
#define REG_R23_NDX 25
#define REG_R16_NDX 19
#define REG_R17_NDX 20
#define REG_R18_NDX 21
#define REG_R19_NDX 22
#define REG_R20_NDX 23
#define REG_R21_NDX 24
#define REG_R22_NDX 25
#define REG_R23_NDX 26
/* $24-25 = t8-t9: More Volatile registers */
#define REG_R24_NDX 26
#define REG_R25_NDX 27
#define REG_R24_NDX 27
#define REG_R25_NDX 28
/* $26-$27 = ko-k1: Reserved for use in exeption handers. These do not need
* to be saved.
@ -123,7 +124,21 @@
#ifdef MIPS32_SAVE_GP
# define REG_R28_NDX 28
# define REG_R28_NDX 29
/* $29 = sp: The value of the stack pointer on return from the exception */
# define REG_R29_NDX 30
/* $30 = either s8 or fp: Depends if a frame pointer is used or not */
# define REG_R30_NDX 31
/* $31 = ra: Return address */
# define REG_R31_NDX 32
# define XCPTCONTEXT_REGS 33
#else
/* $29 = sp: The value of the stack pointer on return from the exception */
@ -137,20 +152,6 @@
# define REG_R31_NDX 31
# define XCPTCONTEXT_REGS 32
#else
/* $29 = sp: The value of the stack pointer on return from the exception */
# define REG_R29_NDX 28
/* $30 = either s8 or fp: Depends if a frame pointer is used or not */
# define REG_R30_NDX 29
/* $31 = ra: Return address */
# define REG_R31_NDX 30
# define XCPTCONTEXT_REGS 31
#endif
#define XCPTCONTEXT_SIZE (4 * XCPTCONTEXT_REGS)
@ -163,6 +164,7 @@
# define REG_MFLO (4*REG_MFLO_NDX)
# define REG_MFHI (4*REG_MFHI_NDX)
# define REG_EPC (4*REG_EPC_NDX)
# define REG_STATUS (4*REG_STATUS_NDX)
# define REG_R1 (4*REG_R1_NDX)
# define REG_R2 (4*REG_R2_NDX)
# define REG_R3 (4*REG_R3_NDX)
@ -198,6 +200,7 @@
# define REG_MFLO REG_MFLO_NDX
# define REG_MFHI REG_MFHI_NDX
# define REG_EPC REG_EPC_NDX
# define REG_STATUS REG_STATUS_NDX
# define REG_R1 REG_R1_NDX
# define REG_R2 REG_R2_NDX
# define REG_R3 REG_R3_NDX
@ -324,6 +327,70 @@ struct xcptcontext
* Inline functions
****************************************************************************/
/****************************************************************************
* Name: cp0_getstatus
*
* Description:
* Disable interrupts
*
* Input Parameters:
* None
*
* Returned Value:
* None
*
****************************************************************************/
static inline irqstate_t cp0_getstatus(void)
{
register irqstate_t status;
__asm__ __volatile__
(
"\t.set push\n"
"\t.set noat\n"
"\t mfc0 %0,$12\n" /* Get CP0 status register */
"\t.set pop\n"
: "=r" (status)
:
: "memory"
);
return status;
}
/****************************************************************************
* Name: cp0_putstatus
*
* Description:
* Disable interrupts
*
* Input Parameters:
* None
*
* Returned Value:
* None
*
****************************************************************************/
static inline void cp0_putstatus(irqstate_t status)
{
__asm__ __volatile__
(
"\t.set push\n"
"\t.set noat\n"
"\t.set noreorder\n"
"\tmtc0 %0,$12\n" /* Set the status to the provided value */
"\tnop\n" /* MTC0 status hazard: */
"\tnop\n" /* Recommended spacing: 3 */
"\tnop\n"
"\tnop\n" /* Plus one for good measure */
"\t.set pop\n"
:
: "r" (status)
: "memory"
);
}
/****************************************************************************
* Public Variables
****************************************************************************/

167
nuttx/arch/mips/src/mips32/up_blocktask.c Executable file
View File

@ -0,0 +1,167 @@
/****************************************************************************
* arch/mips/src/mips32/up_blocktask.c
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdbool.h>
#include <sched.h>
#include <debug.h>
#include <nuttx/arch.h>
#include "os_internal.h"
#include "up_internal.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_block_task
*
* Description:
* The currently executing task at the head of
* the ready to run list must be stopped. Save its context
* and move it to the inactive list specified by task_state.
*
* Inputs:
* tcb: Refers to a task in the ready-to-run list (normally
* the task at the head of the list). It most be
* stopped, its context saved and moved into one of the
* waiting task lists. It it was the task at the head
* of the ready-to-run list, then a context to the new
* ready to run task must be performed.
* task_state: Specifies which waiting task list should be
* hold the blocked task TCB.
*
****************************************************************************/
void up_block_task(_TCB *tcb, tstate_t task_state)
{
/* Verify that the context switch can be performed */
if ((tcb->task_state < FIRST_READY_TO_RUN_STATE) ||
(tcb->task_state > LAST_READY_TO_RUN_STATE))
{
PANIC(OSERR_BADBLOCKSTATE);
}
else
{
_TCB *rtcb = (_TCB*)g_readytorun.head;
bool switch_needed;
/* Remove the tcb task from the ready-to-run list. If we
* are blocking the task at the head of the task list (the
* most likely case), then a context switch to the next
* ready-to-run task is needed. In this case, it should
* also be true that rtcb == tcb.
*/
switch_needed = sched_removereadytorun(tcb);
/* Add the task to the specified blocked task list */
sched_addblocked(tcb, (tstate_t)task_state);
/* If there are any pending tasks, then add them to the g_readytorun
* task list now
*/
if (g_pendingtasks.head)
{
switch_needed |= sched_mergepending();
}
/* Now, perform the context switch if one is needed */
if (switch_needed)
{
/* Are we in an interrupt handler? */
if (current_regs)
{
/* Yes, then we have to do things differently.
* Just copy the current_regs into the OLD rtcb.
*/
up_savestate(rtcb->xcp.regs);
/* Restore the exception context of the rtcb at the (new) head
* of the g_readytorun task list.
*/
rtcb = (_TCB*)g_readytorun.head;
/* Then switch contexts */
up_restorestate(rtcb->xcp.regs);
}
/* No, then we will need to perform the user context switch */
else
{
/* Switch context to the context of the task at the head of the
* ready to run list.
*/
_TCB *nexttcb = (_TCB*)g_readytorun.head;
up_switchcontext(rtcb->xcp.regs, nexttcb->xcp.regs);
/* up_switchcontext forces a context switch to the task at the
* head of the ready-to-run list. It does not 'return' in the
* normal sense. When it does return, it is because the blocked
* task is again ready to run and has execution priority.
*/
}
}
}
}

86
nuttx/arch/mips/src/mips32/up_copystate.c Normal file
View File

@ -0,0 +1,86 @@
/****************************************************************************
* arch/mips/src/mips32/up_copystate.c
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include "os_internal.h"
#include "up_internal.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_copystate
****************************************************************************/
/* A little faster than most memcpy's */
void up_copystate(uint32_t *dest, uint32_t *src)
{
int i;
/* In the Cortex-M3 model, the state is copied from the stack to the TCB,
* but only a reference is passed to get the state from the TCB. So the
* following check avoids copying the TCB save area onto itself:
*/
if (src != dest)
{
for (i = 0; i < XCPTCONTEXT_REGS; i++)
{
*dest++ = *src++;
}
}
}

123
nuttx/arch/mips/src/mips32/up_doirq.c Normal file
View File

@ -0,0 +1,123 @@
/****************************************************************************
* arch/mips/src/mips32/up_doirq.c
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <assert.h>
#include <nuttx/irq.h>
#include <nuttx/arch.h>
#include <arch/board/board.h>
#include "up_arch.h"
#include "os_internal.h"
#include "up_internal.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
uint32_t *up_doirq(int irq, uint32_t *regs)
{
up_ledon(LED_INIRQ);
#ifdef CONFIG_SUPPRESS_INTERRUPTS
PANIC(OSERR_ERREXCEPTION);
#else
uint32_t *savestate;
/* Nested interrupts are not supported in this implementation. If you want
* implemented nested interrupts, you would have to (1) change the way that
* current regs is handled and (2) the design associated with
* CONFIG_ARCH_INTERRUPTSTACK.
*/
/* Current regs non-zero indicates that we are processing an interrupt;
* current_regs is also used to manage interrupt level context switches.
*/
savestate = (uint32_t*)current_regs;
current_regs = regs;
/* Mask and acknowledge the interrupt */
up_maskack_irq(irq);
/* Deliver the IRQ */
irq_dispatch(irq, regs);
/* If a context switch occurred while processing the interrupt then
* current_regs may have change value. If we return any value different
* from the input regs, then the lower level will know that a context
* switch occurred during interrupt processing.
*/
regs = (uint32_t*)current_regs;
/* Restore the previous value of current_regs. NULL would indicate that
* we are no longer in an interrupt handler. It will be non-NULL if we
* are returning from a nested interrupt.
*/
current_regs = savestate;
/* Unmask the last interrupt (global interrupts are still disabled) */
up_enable_irq(irq);
#endif
up_ledoff(LED_INIRQ);
return regs;
}

5
nuttx/arch/mips/src/mips32/up_dumpstate.c
View File

@ -117,8 +117,9 @@ static inline void up_registerdump(void)
if (current_regs)
{
lldbg("MFLO:%08x MFHI:%08x EPC:%08x\n",
current_regs[REG_MFLO], current_regs[REG_MFHI], current_regs[REG_EPC]);
lldbg("MFLO:%08x MFHI:%08x EPC:%08x STATUS:%08x\n",
current_regs[REG_MFLO], current_regs[REG_MFHI], current_regs[REG_EPC],
current_regs[REG_STATUS]);
lldbg("AT:%08x V0:$08x V1:%08x A0:%08x A1:%08x A2:%08x A3:%08x\n",
current_regs[REG_AT], current_regs[REG_V0], current_regs[REG_V1],
current_regs[REG_A0], current_regs[REG_A1], current_regs[REG_A2],

130
nuttx/arch/mips/src/mips32/up_initialstate.c Normal file
View File

@ -0,0 +1,130 @@
/****************************************************************************
* arch/arm/src/cortexm3/up_initialstate.c
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <string.h>
#include <nuttx/arch.h>
#include <arch/irq.h>
#include <arch/mips32/cp0.h>
#include "up_internal.h"
#include "up_arch.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_initial_state
*
* Description:
* A new thread is being started and a new TCB
* has been created. This function is called to initialize
* the processor specific portions of the new TCB.
*
* This function must setup the intial architecture registers
* and/or stack so that execution will begin at tcb->start
* on the next context switch.
*
****************************************************************************/
void up_initial_state(_TCB *tcb)
{
struct xcptcontext *xcp = &tcb->xcp;
irqstate_t status;
/* Initialize the initial exception register context structure */
memset(xcp, 0, sizeof(struct xcptcontext));
/* Save the initial stack pointer */
xcp->regs[REG_SP] = (uint32_t)tcb->adj_stack_ptr;
/* Save the task entry point */
xcp->regs[REG_EPC] = (uint32_t)tcb->start;
/* If this task is running PIC, then set the PIC base register to the
* address of the allocated D-Space region.
*/
#ifdef CONFIG_PIC
# warning "Missing logic"
#endif
/* Set privileged- or unprivileged-mode, depending on how NuttX is
* configured and what kind of thread is being started.
*
* If the kernel build is not selected, then all threads run in
* privileged thread mode.
*/
#ifdef CONFIG_NUTTX_KERNEL
# warning "Missing logic"
#endif
/* Enable or disable interrupts, based on user configuration */
status = cp0_getstatus();
# ifdef CONFIG_SUPPRESS_INTERRUPTS
status &= ~CP0_STATUS_IM_MASK; /* Disable all interrupts */
status |= CP0_STATUS_IM_SWINTS; /* Make sure that S/W interrupts enabled */
#else
status |= CP0_STATUS_IM_ALL; /* Enable all interrupts */
# endif
xcp->regs[REG_STATUS] = status;
}

64
nuttx/arch/mips/src/mips32/up_irq.c
View File

@ -55,70 +55,6 @@
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: cp0_getstatus
*
* Description:
* Disable interrupts
*
* Input Parameters:
* None
*
* Returned Value:
* None
*
****************************************************************************/
static inline irqstate_t cp0_getstatus(void)
{
register irqstate_t status;
__asm__ __volatile__
(
"\t.set push\n"
"\t.set noat\n"
"\t mfc0 %0,$12\n" /* Get CP0 status register */
"\t.set pop\n"
: "=r" (status)
:
: "memory"
);
return status;
}
/****************************************************************************
* Name: cp0_putstatus
*
* Description:
* Disable interrupts
*
* Input Parameters:
* None
*
* Returned Value:
* None
*
****************************************************************************/
static inline void cp0_putstatus(irqstate_t status)
{
__asm__ __volatile__
(
"\t.set push\n"
"\t.set noat\n"
"\t.set noreorder\n"
"\tmtc0 %0,$12\n" /* Set the status to the provided value */
"\tnop\n" /* MTC0 status hazard: */
"\tnop\n" /* Recommended spacing: 3 */
"\tnop\n"
"\tnop\n" /* Plus one for good measure */
"\t.set pop\n"
:
: "r" (status)
: "memory"
);
}
/****************************************************************************
* Public Functions
****************************************************************************/

5
nuttx/arch/mips/src/pic32mx/Make.defs
View File

@ -40,8 +40,9 @@ HEAD_ASRC = pic32mx-head.S
# Common MIPS files
CMN_ASRCS =
CMN_CSRCS = up_allocateheap.c up_assert.c up_createstack.c up_exit.c \
up_idle.c up_initialize.c up_interruptcontext.c up_irq.c \
CMN_CSRCS = up_allocateheap.c up_assert.c up_blocktask.c up_copystate.c \
up_createstack.c up_doirq.c up_exit.c up_idle.c up_initialize.c \
up_initialstate.c up_interruptcontext.c up_irq.c \
up_lowputs.c up_mdelay.c up_modifyreg8.c up_modifyreg16.c \
up_modifyreg32.c up_puts.c up_releasestack.c up_udelay.c \
up_usestack.c

4
nuttx/arch/mips/src/pic32mx/pic32mx-head.S
View File

@ -81,10 +81,6 @@
.global __nmi_handler
.global os_start
/****************************************************************************
* Macros
****************************************************************************/
/****************************************************************************
* Name: __reset
*