diff options
Diffstat (limited to 'arch/powerpc/kernel/exceptions-64s.S')
| -rw-r--r-- | arch/powerpc/kernel/exceptions-64s.S | 32 |
1 files changed, 14 insertions, 18 deletions
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 46508b148e16..ffc15f4f079d 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -1408,22 +1408,9 @@ EXC_VIRT_NONE(0x4b00, 0x100) * * Call convention: * - * syscall register convention is in Documentation/powerpc/syscall64-abi.rst - * - * For hypercalls, the register convention is as follows: - * r0 volatile - * r1-2 nonvolatile - * r3 volatile parameter and return value for status - * r4-r10 volatile input and output value - * r11 volatile hypercall number and output value - * r12 volatile input and output value - * r13-r31 nonvolatile - * LR nonvolatile - * CTR volatile - * XER volatile - * CR0-1 CR5-7 volatile - * CR2-4 nonvolatile - * Other registers nonvolatile + * syscall and hypercalls register conventions are documented in + * Documentation/powerpc/syscall64-abi.rst and + * Documentation/powerpc/papr_hcalls.rst respectively. * * The intersection of volatile registers that don't contain possible * inputs is: cr0, xer, ctr. We may use these as scratch regs upon entry @@ -2208,11 +2195,20 @@ __end_interrupts: DEFINE_FIXED_SYMBOL(__end_interrupts) #ifdef CONFIG_PPC_970_NAP + /* + * Called by exception entry code if _TLF_NAPPING was set, this clears + * the NAPPING flag, and redirects the exception exit to + * power4_fixup_nap_return. + */ + .globl power4_fixup_nap EXC_COMMON_BEGIN(power4_fixup_nap) andc r9,r9,r10 std r9,TI_LOCAL_FLAGS(r11) - ld r10,_LINK(r1) /* make idle task do the */ - std r10,_NIP(r1) /* equivalent of a blr */ + LOAD_REG_ADDR(r10, power4_idle_nap_return) + std r10,_NIP(r1) + blr + +power4_idle_nap_return: blr #endif |