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parisc: Add wrapper for pdc_instr() firmware function 

Signed-off-by: Helge Deller <deller@gmx.de>
hifive-unleashed-5.1
Helge Deller 2017-09-17 21:15:09 +02:00
parent 08b8a99b2c
commit 77089c5274
2 changed files with 21 additions and 0 deletions
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1
arch/parisc/include/asm/pdc.h
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@ -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);

20
arch/parisc/kernel/firmware.c
View File

@ -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.