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93b9b282
编写于
6月 23, 2013
作者:
wuyangyong
浏览文件
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电子邮件补丁
差异文件
format code by Astyle.
上级
9acd018c
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
103 addition
and
103 deletion
+103
-103
libcpu/arm/cortex-m0/context_gcc.S
libcpu/arm/cortex-m0/context_gcc.S
+103
-103
未找到文件。
libcpu/arm/cortex-m0/context_gcc.S
浏览文件 @
93b9b282
...
...
@@ -16,143 +16,143 @@
*
2013
-
06
-
18
aozima
add
restore
MSP
feature
.
*/
.
cpu
cortex
-
m3
.
fpu
softvfp
.
syntax
unified
.
thumb
.
text
.
cpu
cortex
-
m3
.
fpu
softvfp
.
syntax
unified
.
thumb
.
text
.
equ
SCB_VTOR
,
0xE000ED04
/*
Vector
Table
Offset
Register
*/
.
equ
ICSR
,
0xE000ED04
/*
interrupt
control
state
register
*/
.
equ
PENDSVSET_BIT
,
0x10000000
/*
value
to
trigger
PendSV
exception
*/
.
equ
SHPR3
,
0xE000ED20
/*
system
priority
register
(
3
)
*/
.
equ
PENDSV_PRI_LOWEST
,
0x00FF0000
/*
PendSV
priority
value
(
lowest
)
*/
.
equ
ICSR
,
0xE000ED04
/*
interrupt
control
state
register
*/
.
equ
PENDSVSET_BIT
,
0x10000000
/*
value
to
trigger
PendSV
exception
*/
.
equ
SHPR3
,
0xE000ED20
/*
system
priority
register
(
3
)
*/
.
equ
PENDSV_PRI_LOWEST
,
0x00FF0000
/*
PendSV
priority
value
(
lowest
)
*/
/*
*
rt_base_t
rt_hw_interrupt_disable
()
;
*/
.
global
rt_hw_interrupt_disable
.
type
rt_hw_interrupt_disable
,
%
function
.
global
rt_hw_interrupt_disable
.
type
rt_hw_interrupt_disable
,
%
function
rt_hw_interrupt_disable
:
MRS
R0
,
PRIMASK
CPSID
I
BX
LR
MRS
R0
,
PRIMASK
CPSID
I
BX
LR
/*
*
void
rt_hw_interrupt_enable
(
rt_base_t
level
)
;
*/
.
global
rt_hw_interrupt_enable
.
type
rt_hw_interrupt_enable
,
%
function
.
global
rt_hw_interrupt_enable
.
type
rt_hw_interrupt_enable
,
%
function
rt_hw_interrupt_enable
:
MSR
PRIMASK
,
R0
BX
LR
MSR
PRIMASK
,
R0
BX
LR
/*
*
void
rt_hw_context_switch
(
rt_uint32
from
,
rt_uint32
to
)
;
*
R0
-->
from
*
R1
-->
to
*/
.
global
rt_hw_context_switch_interrupt
.
type
rt_hw_context_switch_interrupt
,
%
function
.
global
rt_hw_context_switch
.
type
rt_hw_context_switch
,
%
function
.
global
rt_hw_context_switch_interrupt
.
type
rt_hw_context_switch_interrupt
,
%
function
.
global
rt_hw_context_switch
.
type
rt_hw_context_switch
,
%
function
rt_hw_context_switch_interrupt
:
rt_hw_context_switch
:
/
*
set
rt_thread_switch_interrupt_flag
to
1
*/
LDR
R2
,
=
rt_thread_switch_interrupt_flag
LDR
R3
,
[
R2
]
CMP
R3
,
#
1
BEQ
_reswitch
MOV
R3
,
#
1
STR
R3
,
[
R2
]
/
*
set
rt_thread_switch_interrupt_flag
to
1
*/
LDR
R2
,
=
rt_thread_switch_interrupt_flag
LDR
R3
,
[
R2
]
CMP
R3
,
#
1
BEQ
_reswitch
MOV
R3
,
#
1
STR
R3
,
[
R2
]
LDR
R2
,
=
rt_interrupt_from_thread
/*
set
rt_interrupt_from_thread
*/
STR
R0
,
[
R2
]
LDR
R2
,
=
rt_interrupt_from_thread
/*
set
rt_interrupt_from_thread
*/
STR
R0
,
[
R2
]
_reswitch
:
LDR
R2
,
=
rt_interrupt_to_thread
/*
set
rt_interrupt_to_thread
*/
STR
R1
,
[
R2
]
LDR
R2
,
=
rt_interrupt_to_thread
/*
set
rt_interrupt_to_thread
*/
STR
R1
,
[
R2
]
LDR
R0
,
=
ICSR
/*
trigger
the
PendSV
exception
(
causes
context
switch
)
*/
LDR
R1
,
=
PENDSVSET_BIT
STR
R1
,
[
R0
]
BX
LR
LDR
R0
,
=
ICSR
/*
trigger
the
PendSV
exception
(
causes
context
switch
)
*/
LDR
R1
,
=
PENDSVSET_BIT
STR
R1
,
[
R0
]
BX
LR
/*
R0
-->
swith
from
thread
stack
*
R1
-->
swith
to
thread
stack
*
psr
,
pc
,
LR
,
R12
,
R3
,
R2
,
R1
,
R0
are
pushed
into
[
from
]
stack
*/
.
global
PendSV_Handler
.
type
PendSV_Handler
,
%
function
.
global
PendSV_Handler
.
type
PendSV_Handler
,
%
function
PendSV_Handler
:
/
*
disable
interrupt
to
protect
context
switch
*/
MRS
R2
,
PRIMASK
CPSID
I
/
*
disable
interrupt
to
protect
context
switch
*/
MRS
R2
,
PRIMASK
CPSID
I
/
*
get
rt_thread_switch_interrupt_flag
*/
LDR
R0
,
=
rt_thread_switch_interrupt_flag
LDR
R1
,
[
R0
]
CBZ
R1
,
pendsv_exit
/*
pendsv
aLReady
handled
*/
/
*
get
rt_thread_switch_interrupt_flag
*/
LDR
R0
,
=
rt_thread_switch_interrupt_flag
LDR
R1
,
[
R0
]
CBZ
R1
,
pendsv_exit
/*
pendsv
aLReady
handled
*/
/
*
clear
rt_thread_switch_interrupt_flag
to
0
*/
MOV
R1
,
#
0
STR
R1
,
[
R0
]
/
*
clear
rt_thread_switch_interrupt_flag
to
0
*/
MOV
R1
,
#
0
STR
R1
,
[
R0
]
LDR
R0
,
=
rt_interrupt_from_thread
LDR
R1
,
[
R0
]
CBZ
R1
,
swtich_to_thread
/*
skip
register
save
at
the
first
time
*/
LDR
R0
,
=
rt_interrupt_from_thread
LDR
R1
,
[
R0
]
CBZ
R1
,
swtich_to_thread
/*
skip
register
save
at
the
first
time
*/
MRS
R1
,
PSP
/*
get
from
thread
stack
pointer
*/
STMFD
R1
!,
{
R4
-
R11
}
/*
push
R4
-
R11
register
*/
LDR
R0
,
[
R0
]
STR
R1
,
[
R0
]
/*
update
from
thread
stack
pointer
*/
MRS
R1
,
PSP
/*
get
from
thread
stack
pointer
*/
STMFD
R1
!,
{
R4
-
R11
}
/*
push
R4
-
R11
register
*/
LDR
R0
,
[
R0
]
STR
R1
,
[
R0
]
/*
update
from
thread
stack
pointer
*/
swtich_to_thread
:
LDR
R1
,
=
rt_interrupt_to_thread
LDR
R1
,
[
R1
]
LDR
R1
,
[
R1
]
/*
load
thread
stack
pointer
*/
LDR
R1
,
=
rt_interrupt_to_thread
LDR
R1
,
[
R1
]
LDR
R1
,
[
R1
]
/*
load
thread
stack
pointer
*/
LDMFD
R1
!,
{
R4
-
R11
}
/*
pop
R4
-
R11
register
*/
MSR
PSP
,
R1
/*
update
stack
pointer
*/
LDMFD
R1
!,
{
R4
-
R11
}
/*
pop
R4
-
R11
register
*/
MSR
PSP
,
R1
/*
update
stack
pointer
*/
pendsv_exit
:
/
*
restore
interrupt
*/
MSR
PRIMASK
,
R2
/
*
restore
interrupt
*/
MSR
PRIMASK
,
R2
ORR
LR
,
LR
,
#
0x04
BX
LR
ORR
LR
,
LR
,
#
0x04
BX
LR
/*
*
void
rt_hw_context_switch_to
(
rt_uint32
to
)
;
*
R0
-->
to
*/
.
global
rt_hw_context_switch_to
.
type
rt_hw_context_switch_to
,
%
function
.
global
rt_hw_context_switch_to
.
type
rt_hw_context_switch_to
,
%
function
rt_hw_context_switch_to
:
LDR
R1
,
=
rt_interrupt_to_thread
STR
R0
,
[
R1
]
/
*
set
from
thread
to
0
*/
LDR
R1
,
=
rt_interrupt_from_thread
MOV
R0
,
#
0
STR
R0
,
[
R1
]
/
*
set
interrupt
flag
to
1
*/
LDR
R1
,
=
rt_thread_switch_interrupt_flag
MOV
R0
,
#
1
STR
R0
,
[
R1
]
/
*
set
the
PendSV
exception
priority
*/
LDR
R0
,
=
SHPR3
LDR
R1
,
=
PENDSV_PRI_LOWEST
LDR.W
R2
,
[
R0
,#
0
]
/*
read
*/
ORR
R1
,
R1
,
R2
/*
modify
*/
STR
R1
,
[
R0
]
/*
write
-
back
*/
LDR
R0
,
=
ICSR
/*
trigger
the
PendSV
exception
(
causes
context
switch
)
*/
LDR
R1
,
=
PENDSVSET_BIT
STR
R1
,
[
R0
]
LDR
R1
,
=
rt_interrupt_to_thread
STR
R0
,
[
R1
]
/
*
set
from
thread
to
0
*/
LDR
R1
,
=
rt_interrupt_from_thread
MOV
R0
,
#
0
STR
R0
,
[
R1
]
/
*
set
interrupt
flag
to
1
*/
LDR
R1
,
=
rt_thread_switch_interrupt_flag
MOV
R0
,
#
1
STR
R0
,
[
R1
]
/
*
set
the
PendSV
exception
priority
*/
LDR
R0
,
=
SHPR3
LDR
R1
,
=
PENDSV_PRI_LOWEST
LDR.W
R2
,
[
R0
,#
0
]
/*
read
*/
ORR
R1
,
R1
,
R2
/*
modify
*/
STR
R1
,
[
R0
]
/*
write
-
back
*/
LDR
R0
,
=
ICSR
/*
trigger
the
PendSV
exception
(
causes
context
switch
)
*/
LDR
R1
,
=
PENDSVSET_BIT
STR
R1
,
[
R0
]
/
*
restore
MSP
*/
LDR
r0
,
=
SCB_VTOR
...
...
@@ -161,19 +161,19 @@ rt_hw_context_switch_to:
NOP
MSR
msp
,
r0
CPSIE
I
/*
enable
interrupts
at
processor
level
*/
CPSIE
I
/*
enable
interrupts
at
processor
level
*/
/
*
never
reach
here
!
*/
/
*
never
reach
here
!
*/
/*
compatible
with
old
version
*/
.
global
rt_hw_interrupt_thread_switch
.
type
rt_hw_interrupt_thread_switch
,
%
function
.
global
rt_hw_interrupt_thread_switch
.
type
rt_hw_interrupt_thread_switch
,
%
function
rt_hw_interrupt_thread_switch
:
BX
LR
NOP
BX
LR
NOP
.
global
HardFault_Handler
.
type
HardFault_Handler
,
%
function
.
global
HardFault_Handler
.
type
HardFault_Handler
,
%
function
HardFault_Handler
:
/
*
get
current
context
*/
MRS
R0
,
PSP
/*
get
fault
thread
stack
pointer
*/
...
...
@@ -188,8 +188,8 @@ HardFault_Handler:
*
rt_uint32_t
rt_hw_interrupt_check
(
void
)
;
*
R0
-->
state
*/
.
global
rt_hw_interrupt_check
.
type
rt_hw_interrupt_check
,
%
function
.
global
rt_hw_interrupt_check
.
type
rt_hw_interrupt_check
,
%
function
rt_hw_interrupt_check
:
MRS
R0
,
IPSR
BX
LR
MRS
R0
,
IPSR
BX
LR
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