diff options
| author | Joakim Tjernlund <Joakim.Tjernlund@transmode.se> | 2010-01-19 14:41:55 +0100 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2010-01-26 19:30:12 +0100 |
| commit | fc4e188789b01dc9f18c80869c43fdd7d1a51378 (patch) | |
| tree | bff9ddbb66b0e5946f1bf73da1021f3ce1befc0d /include | |
| parent | 2903ad33a71251a3a87485b5b185852c8998f209 (diff) | |
ppc: Loose GOT access in IRQ
Using the GOT in IRQ handlers requires r14 to be -ffixed-r14.
Avoid this by relocatate transfer_to_handler too.
This will allow to free up r14 later on.
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Diffstat (limited to 'include')
| -rw-r--r-- | include/ppc_asm.tmpl | 47 |
1 files changed, 22 insertions, 25 deletions
diff --git a/include/ppc_asm.tmpl b/include/ppc_asm.tmpl index 0019d46090..fa5c5f66c1 100644 --- a/include/ppc_asm.tmpl +++ b/include/ppc_asm.tmpl @@ -257,46 +257,43 @@ * OFFSET values only; they must be relocated first before they can * be used! */ -#define STD_EXCEPTION(n, label, hdlr) \ - . = n; \ -label: \ - EXCEPTION_PROLOG(SRR0, SRR1); \ - lwz r3,GOT(transfer_to_handler); \ - mtlr r3; \ - addi r3,r1,STACK_FRAME_OVERHEAD; \ - li r20,MSR_KERNEL; \ +#define COPY_EE(d, s) rlwimi d,s,0,16,16 +#define NOCOPY(d, s) +#define EXC_XFER_TEMPLATE(label, hdlr, msr, copyee) \ + bl 1f; \ +1: mflr r20; \ + lwz r20,(.L_ ## label)-1b+8(r20); \ + mtlr r20; \ + li r20,msr; \ + copyee(r20,r23); \ rlwimi r20,r23,0,25,25; \ blrl; \ .L_ ## label : \ .long hdlr - _start + _START_OFFSET; \ - .long int_return - _start + _START_OFFSET + .long int_return - _start + _START_OFFSET; \ + .long transfer_to_handler - _start + _START_OFFSET + +#define STD_EXCEPTION(n, label, hdlr) \ + . = n; \ +label: \ + EXCEPTION_PROLOG(SRR0, SRR1); \ + addi r3,r1,STACK_FRAME_OVERHEAD; \ + EXC_XFER_TEMPLATE(label, hdlr, MSR_KERNEL, NOCOPY) \ #define CRIT_EXCEPTION(n, label, hdlr) \ . = n; \ label: \ EXCEPTION_PROLOG(CSRR0, CSRR1); \ - lwz r3,GOT(transfer_to_handler); \ - mtlr r3; \ addi r3,r1,STACK_FRAME_OVERHEAD; \ - li r20,(MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)); \ - rlwimi r20,r23,0,25,25; \ - blrl; \ -.L_ ## label : \ - .long hdlr - _start + _START_OFFSET; \ - .long crit_return - _start + _START_OFFSET + EXC_XFER_TEMPLATE(label, hdlr, \ + MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \ #define MCK_EXCEPTION(n, label, hdlr) \ . = n; \ label: \ EXCEPTION_PROLOG(MCSRR0, MCSRR1); \ - lwz r3,GOT(transfer_to_handler); \ - mtlr r3; \ addi r3,r1,STACK_FRAME_OVERHEAD; \ - li r20,(MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)); \ - rlwimi r20,r23,0,25,25; \ - blrl; \ -.L_ ## label : \ - .long hdlr - _start + _START_OFFSET; \ - .long mck_return - _start + _START_OFFSET + EXC_XFER_TEMPLATE(label, hdlr, \ + MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE), NOCOPY) \ #endif /* __PPC_ASM_TMPL__ */ |