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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* TOC (Transfer of Control) handler. */
.level 1.1
#include <asm/assembly.h>
#include <linux/threads.h>
#include <linux/linkage.h>
.text
.import toc_intr,code
.import toc_stack,data
.align 16
ENTRY_CFI(toc_handler)
load32 PA(toc_stack),%sp
#ifdef CONFIG_SMP
/* get per-cpu toc_stack address. */
mfctl %cr30, %r1
tophys %r1,%r2 /* task_struct */
LDREG TASK_TI_CPU(%r2),%r4 /* cpu */
load32 PA(__per_cpu_offset),%r1
LDREGX %r4(%r1),%r4
add %r4,%sp,%sp
#endif
/*
* setup pt_regs on stack and save the
* floating point registers. PIM_TOC doesn't
* save fp registers, so we're doing it here.
*/
copy %sp,%arg0
ldo PT_SZ_ALGN(%sp), %sp
/* clear pt_regs */
copy %arg0,%r1
0: cmpb,<<,n %r1,%sp,0b
stw,ma %r0,4(%r1)
ldo PT_FR0(%arg0),%r25
save_fp %r25
/* go virtual */
load32 PA(swapper_pg_dir),%r4
mtctl %r4,%cr24
mtctl %r4,%cr25
/* Clear sr4-sr7 */
mtsp %r0, %sr4
mtsp %r0, %sr5
mtsp %r0, %sr6
mtsp %r0, %sr7
tovirt_r1 %sp
tovirt_r1 %arg0
virt_map
loadgp
#ifdef CONFIG_64BIT
ldo -16(%sp),%r29
#endif
load32 toc_intr,%r1
be 0(%sr7,%r1)
nop
ENDPROC_CFI(toc_handler)
/*
* keep this checksum here, as it is part of the toc_handler
* spanned by toc_handler_size (all words in toc_handler are
* added in PDC and the sum must equal to zero.
*/
SYM_DATA(toc_handler_csum, .long 0)
SYM_DATA(toc_handler_size, .long . - toc_handler)
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