diff options
| author | Helge Deller <deller@gmx.de> | 2017-07-25 20:26:23 +0300 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2017-07-25 20:28:37 +0300 |
| commit | 25a9b76597fafbbf688dd4473cb910568deb2b0c (patch) | |
| tree | 0e7b0b216bf0ecdd115ec882bf62213f97cf9352 | |
| parent | f520e55241e1cf0c10d308ccf47513f28533f60a (diff) | |
| download | linux-25a9b76597fafbbf688dd4473cb910568deb2b0c.tar.xz | |
parisc: Add function to return DIMM slot of physical address
Add a firmware wrapper function, which asks PDC firmware for the DIMM slot of a
physical address. This is needed to show users which DIMM module needs
replacement in case a broken DIMM was encountered.
Signed-off-by: Helge Deller <deller@gmx.de>
| -rw-r--r-- | arch/parisc/include/asm/pdcpat.h | 16 | ||||
| -rw-r--r-- | arch/parisc/kernel/firmware.c | 25 |
2 files changed, 40 insertions, 1 deletions
diff --git a/arch/parisc/include/asm/pdcpat.h b/arch/parisc/include/asm/pdcpat.h index 32e105fb8adb..e3c0586260d8 100644 --- a/arch/parisc/include/asm/pdcpat.h +++ b/arch/parisc/include/asm/pdcpat.h @@ -150,7 +150,7 @@ #define PDC_PAT_MEM_SETGM 9L /* Set Good Memory value */ #define PDC_PAT_MEM_ADD_PAGE 10L /* ADDs a page to the cell */ #define PDC_PAT_MEM_ADDRESS 11L /* Get Physical Location From */ - /* Memory Address */ + /* Memory Address */ #define PDC_PAT_MEM_GET_TXT_SIZE 12L /* Get Formatted Text Size */ #define PDC_PAT_MEM_GET_PD_TXT 13L /* Get PD Formatted Text */ #define PDC_PAT_MEM_GET_CELL_TXT 14L /* Get Cell Formatted Text */ @@ -228,6 +228,17 @@ struct pdc_pat_mem_read_pd_retinfo { /* PDC_PAT_MEM/PDC_PAT_MEM_PD_READ */ unsigned long pdt_entries; }; +struct pdc_pat_mem_phys_mem_location { /* PDC_PAT_MEM/PDC_PAT_MEM_ADDRESS */ + u64 cabinet:8; + u64 ign1:8; + u64 ign2:8; + u64 cell_slot:8; + u64 ign3:8; + u64 dimm_slot:8; /* DIMM slot, e.g. 0x1A, 0x2B, show user hex value! */ + u64 ign4:8; + u64 source:4; /* for mem: always 0x07 */ + u64 source_detail:4; /* for mem: always 0x04 (SIMM or DIMM) */ +}; struct pdc_pat_pd_addr_map_entry { unsigned char entry_type; /* 1 = Memory Descriptor Entry Type */ @@ -319,6 +330,9 @@ extern int pdc_pat_mem_read_cell_pdt(struct pdc_pat_mem_read_pd_retinfo *pret, extern int pdc_pat_mem_read_pd_pdt(struct pdc_pat_mem_read_pd_retinfo *pret, unsigned long *pdt_entries_ptr, unsigned long count, unsigned long offset); +extern int pdc_pat_mem_get_dimm_phys_location( + struct pdc_pat_mem_phys_mem_location *pret, + unsigned long phys_addr); #endif /* __ASSEMBLY__ */ diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c index 526ed90ca56f..f622a311d04a 100644 --- a/arch/parisc/kernel/firmware.c +++ b/arch/parisc/kernel/firmware.c @@ -1498,6 +1498,31 @@ int pdc_pat_mem_read_pd_pdt(struct pdc_pat_mem_read_pd_retinfo *pret, return retval; } + +/** + * pdc_pat_mem_get_dimm_phys_location - Get physical DIMM slot via PAT firmware + * @pret: ptr to hold returned information + * @phys_addr: physical address to examine + * + */ +int pdc_pat_mem_get_dimm_phys_location( + struct pdc_pat_mem_phys_mem_location *pret, + unsigned long phys_addr) +{ + int retval; + unsigned long flags; + + spin_lock_irqsave(&pdc_lock, flags); + retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_ADDRESS, + __pa(&pdc_result), phys_addr); + + if (retval == PDC_OK) + memcpy(pret, &pdc_result, sizeof(*pret)); + + spin_unlock_irqrestore(&pdc_lock, flags); + + return retval; +} #endif /* CONFIG_64BIT */ |