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parisc: Show machine product number during boot

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Ask PDC firmware during boot for the original and current product
number as well as the serial number and show it (if available).

Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Helge Deller 2019-02-08 18:28:13 +01:00
parent 661faf3102
commit 8207d4ee44
3 changed files with 34 additions and 0 deletions
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1
arch/parisc/include/asm/pdc.h
View File

@ -44,6 +44,7 @@ int pdc_model_sysmodel(char *name);
int pdc_model_cpuid(unsigned long *cpu_id);
int pdc_model_versions(unsigned long *versions, int id);
int pdc_model_capabilities(unsigned long *capabilities);
int pdc_model_platform_info(char *orig_prod_num, char *current_prod_num, char *serial_no);
int pdc_cache_info(struct pdc_cache_info *cache);
int pdc_spaceid_bits(unsigned long *space_bits);
#ifndef CONFIG_PA20

24
arch/parisc/kernel/firmware.c
View File

@ -568,6 +568,30 @@ int pdc_model_capabilities(unsigned long *capabilities)
return retval;
}
/**
* pdc_model_platform_info - Returns machine product and serial number.
* @orig_prod_num: Return buffer for original product number.
* @current_prod_num: Return buffer for current product number.
* @serial_no: Return buffer for serial number.
*
* Returns strings containing the original and current product numbers and the
* serial number of the system.
*/
int pdc_model_platform_info(char *orig_prod_num, char *current_prod_num,
char *serial_no)
{
int retval;
unsigned long flags;
spin_lock_irqsave(&pdc_lock, flags);
retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_GET_PLATFORM_INFO,
__pa(orig_prod_num), __pa(current_prod_num), __pa(serial_no));
convert_to_wide(pdc_result);
spin_unlock_irqrestore(&pdc_lock, flags);
return retval;
}
/**
* pdc_cache_info - Return cache and TLB information.
* @cache_info: The return buffer.

9
arch/parisc/kernel/processor.c
View File

@ -242,6 +242,7 @@ static int __init processor_probe(struct parisc_device *dev)
void __init collect_boot_cpu_data(void)
{
unsigned long cr16_seed;
char orig_prod_num[64], current_prod_num[64], serial_no[64];
memset(&boot_cpu_data, 0, sizeof(boot_cpu_data));
@ -301,6 +302,14 @@ void __init collect_boot_cpu_data(void)
_parisc_requires_coherency = (boot_cpu_data.cpu_type == mako) ||
(boot_cpu_data.cpu_type == mako2);
#endif
if (pdc_model_platform_info(orig_prod_num, current_prod_num, serial_no) == PDC_OK) {
printk(KERN_INFO "product %s, original product %s, S/N: %s\n",
current_prod_num, orig_prod_num, serial_no);
add_device_randomness(orig_prod_num, strlen(orig_prod_num));
add_device_randomness(current_prod_num, strlen(current_prod_num));
add_device_randomness(serial_no, strlen(serial_no));
}
}