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parisc: Retrieve and display the PDC PAT capabilities 

Signed-off-by: Helge Deller <deller@gmx.de>
hifive-unleashed-5.1
Helge Deller 2018-10-19 22:13:49 +02:00
parent 4c5fe5db1a
commit e543b3a620
2 changed files with 11 additions and 0 deletions
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1
arch/parisc/include/asm/pdc.h
View File

@ -11,6 +11,7 @@ extern int parisc_narrow_firmware;
extern int pdc_type;
extern unsigned long parisc_cell_num; /* cell number the CPU runs on (PAT) */
extern unsigned long parisc_cell_loc; /* cell location of CPU (PAT) */
extern unsigned long parisc_pat_pdc_cap; /* PDC capabilities (PAT) */
/* Values for pdc_type */
#define PDC_TYPE_ILLEGAL -1

10
arch/parisc/kernel/inventory.c
View File

@ -43,6 +43,7 @@ int pdc_type __read_mostly = PDC_TYPE_ILLEGAL;
/* cell number and location (PAT firmware only) */
unsigned long parisc_cell_num __read_mostly;
unsigned long parisc_cell_loc __read_mostly;
unsigned long parisc_pat_pdc_cap __read_mostly;
void __init setup_pdc(void)
@ -81,12 +82,21 @@ void __init setup_pdc(void)
#ifdef CONFIG_64BIT
status = pdc_pat_cell_get_number(&cell_info);
if (status == PDC_OK) {
unsigned long legacy_rev, pat_rev;
pdc_type = PDC_TYPE_PAT;
pr_cont("64 bit PAT.\n");
parisc_cell_num = cell_info.cell_num;
parisc_cell_loc = cell_info.cell_loc;
pr_info("PAT: Running on cell %lu and location %lu.\n",
parisc_cell_num, parisc_cell_loc);
status = pdc_pat_pd_get_pdc_revisions(&legacy_rev,
&pat_rev, &parisc_pat_pdc_cap);
pr_info("PAT: legacy revision 0x%lx, pat_rev 0x%lx, pdc_cap 0x%lx, S-PTLB %d, HPMC_RENDEZ %d.\n",
legacy_rev, pat_rev, parisc_pat_pdc_cap,
parisc_pat_pdc_cap
& PDC_PAT_CAPABILITY_BIT_SIMULTANEOUS_PTLB ? 1:0,
parisc_pat_pdc_cap
& PDC_PAT_CAPABILITY_BIT_PDC_HPMC_RENDEZ ? 1:0);
return;
}
#endif