From 77089c5274fe2f72db5a2cd956d0d308aed08e68 Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Sun, 17 Sep 2017 21:15:09 +0200 Subject: [PATCH] parisc: Add wrapper for pdc_instr() firmware function Signed-off-by: Helge Deller --- arch/parisc/include/asm/pdc.h | 1 + arch/parisc/kernel/firmware.c | 20 ++++++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/arch/parisc/include/asm/pdc.h b/arch/parisc/include/asm/pdc.h index 26b4455baa83..510341f62d97 100644 --- a/arch/parisc/include/asm/pdc.h +++ b/arch/parisc/include/asm/pdc.h @@ -280,6 +280,7 @@ void setup_pdc(void); /* in inventory.c */ /* wrapper-functions from pdc.c */ int pdc_add_valid(unsigned long address); +int pdc_instr(unsigned int *instr); int pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsigned long len); int pdc_chassis_disp(unsigned long disp); int pdc_chassis_warn(unsigned long *warn); diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c index ab80e5c6f651..6d471c00c71a 100644 --- a/arch/parisc/kernel/firmware.c +++ b/arch/parisc/kernel/firmware.c @@ -232,6 +232,26 @@ int pdc_add_valid(unsigned long address) } EXPORT_SYMBOL(pdc_add_valid); +/** + * pdc_instr - Get instruction that invokes PDCE_CHECK in HPMC handler. + * @instr: Pointer to variable which will get instruction opcode. + * + * The return value is PDC_OK (0) in case call succeeded. + */ +int __init pdc_instr(unsigned int *instr) +{ + int retval; + unsigned long flags; + + spin_lock_irqsave(&pdc_lock, flags); + retval = mem_pdc_call(PDC_INSTR, 0UL, __pa(pdc_result)); + convert_to_wide(pdc_result); + *instr = pdc_result[0]; + spin_unlock_irqrestore(&pdc_lock, flags); + + return retval; +} + /** * pdc_chassis_info - Return chassis information. * @result: The return buffer.