dlan17/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

xtensa: reorganize SR referencing

Browse Source 
- reference SRs by names where possible, not by numbers;
- get rid of __stringify around SR names where possible;
- remove unneeded SR names from asm/regs.h;
- add SREG_ prefix to remaining SR names;

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
This commit is contained in:
Max Filippov
2012-10-15 03:55:38 +04:00
committed by Chris Zankel
parent f4349b6e01
commit bc5378fcba
20 changed files with 254 additions and 292 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/xtensa/kernel/align.S
+19 -19
View File
@@ -170,15 +170,15 @@ ENTRY(fast_unaligned)
s32i a7, a2, PT_AREG7
s32i a8, a2, PT_AREG8
rsr a0, DEPC
xsr a3, EXCSAVE_1
rsr a0, depc
xsr a3, excsave1
s32i a0, a2, PT_AREG2
s32i a3, a2, PT_AREG3
/* Keep value of SAR in a0 */
rsr a0, SAR
rsr a8, EXCVADDR # load unaligned memory address
rsr a0, sar
rsr a8, excvaddr # load unaligned memory address
/* Now, identify one of the following load/store instructions.
*
@@ -197,7 +197,7 @@ ENTRY(fast_unaligned)
/* Extract the instruction that caused the unaligned access. */
rsr a7, EPC_1 # load exception address
rsr a7, epc1 # load exception address
movi a3, ~3
and a3, a3, a7 # mask lower bits
@@ -275,16 +275,16 @@ ENTRY(fast_unaligned)
1:
#if XCHAL_HAVE_LOOPS
rsr a5, LEND # check if we reached LEND
rsr a5, lend # check if we reached LEND
bne a7, a5, 1f
rsr a5, LCOUNT # and LCOUNT != 0
rsr a5, lcount # and LCOUNT != 0
beqz a5, 1f
addi a5, a5, -1 # decrement LCOUNT and set
rsr a7, LBEG # set PC to LBEGIN
wsr a5, LCOUNT
rsr a7, lbeg # set PC to LBEGIN
wsr a5, lcount
#endif
1: wsr a7, EPC_1 # skip load instruction
1: wsr a7, epc1 # skip load instruction
extui a4, a4, INSN_T, 4 # extract target register
movi a5, .Lload_table
addx8 a4, a4, a5
@@ -355,16 +355,16 @@ ENTRY(fast_unaligned)
1:
#if XCHAL_HAVE_LOOPS
rsr a4, LEND # check if we reached LEND
rsr a4, lend # check if we reached LEND
bne a7, a4, 1f
rsr a4, LCOUNT # and LCOUNT != 0
rsr a4, lcount # and LCOUNT != 0
beqz a4, 1f
addi a4, a4, -1 # decrement LCOUNT and set
rsr a7, LBEG # set PC to LBEGIN
wsr a4, LCOUNT
rsr a7, lbeg # set PC to LBEGIN
wsr a4, lcount
#endif
1: wsr a7, EPC_1 # skip store instruction
1: wsr a7, epc1 # skip store instruction
movi a4, ~3
and a4, a4, a8 # align memory address
@@ -406,7 +406,7 @@ ENTRY(fast_unaligned)
.Lexit:
movi a4, 0
rsr a3, EXCSAVE_1
rsr a3, excsave1
s32i a4, a3, EXC_TABLE_FIXUP
/* Restore working register */
@@ -420,7 +420,7 @@ ENTRY(fast_unaligned)
/* restore SAR and return */
wsr a0, SAR
wsr a0, sar
l32i a0, a2, PT_AREG0
l32i a2, a2, PT_AREG2
rfe
@@ -438,10 +438,10 @@ ENTRY(fast_unaligned)
l32i a6, a2, PT_AREG6
l32i a5, a2, PT_AREG5
l32i a4, a2, PT_AREG4
wsr a0, SAR
wsr a0, sar
mov a1, a2
rsr a0, PS
rsr a0, ps
bbsi.l a2, PS_UM_BIT, 1f # jump if user mode
movi a0, _kernel_exception