kernel.git/arch/parisc/kernel/firmware.c, branch linux-4.19.y

parisc/firmware: Fix F-extend for PDC addresses

2024-02-23T07:12:40Z

commit 735ae74f73e55c191d48689bd11ff4a06ea0508f upstream. When running with narrow firmware (64-bit kernel using a 32-bit firmware), extend PDC addresses into the 0xfffffff0.00000000 region instead of the 0xf0f0f0f0.00000000 region. This fixes the power button on the C3700 machine in qemu (64-bit CPU with 32-bit firmware), and my assumption is that the previous code was really never used (because most 64-bit machines have a 64-bit firmware), or it just worked on very old machines because they may only decode 40-bit of virtual addresses. Cc: stable@vger.kernel.org Signed-off-by: Helge Deller Signed-off-by: Greg Kroah-Hartman

parisc: Fix return code of pdc_iodc_print()

2023-02-22T11:47:15Z

commit 5d1335dabb3c493a3d6d5b233953b6ac7b6c1ff2 upstream. There is an off-by-one if the printed string includes a new-line char. Cc: stable@vger.kernel.org Signed-off-by: Helge Deller Signed-off-by: Greg Kroah-Hartman

parisc: Add wrapper for pdc_instr() firmware function

2017-09-22T17:46:44Z

Signed-off-by: Helge Deller

parisc: Make existing core files reuseable for bootloader

2017-08-22T14:34:35Z

Signed-off-by: Helge Deller

parisc: PDT/firmware: Add support to read PDT on older PAT-machines

2017-08-22T14:34:33Z

Older machines with a PAT firmware (e.g. the rp5470) return their Page Deallocation Table (PDT) info per cell via the PDC_PAT_MEM_PD_INFO PDC call. This patch adds the necessary structures and wrappers to call firmware. Signed-off-by: Helge Deller

parisc: Add function to return DIMM slot of physical address

2017-07-25T17:28:37Z

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

parisc: Fix crash when calling PDC_PAT_MEM PDT firmware function

2017-07-25T16:24:39Z

Commit c9c2877d08d9 ("parisc: Add Page Deallocation Table (PDT) support") introduced the pdc_pat_mem_read_pd_pdt() firmware helper function, which crashed the system because it trashed the stack if the pdc_pat_mem_read_pd_retinfo struct was located on the stack (and which is in size less than the required 32 64-bit values). Fix it by using the pdc_result struct instead when calling firmware and copy the return values back into the result struct when finished sucessfully. While debugging this code I noticed that the pdc_type wasn't set correctly either, so let's fix that too. Fixes: c9c2877d08d9 ("parisc: Add Page Deallocation Table (PDT) support") Signed-off-by: Helge Deller

parisc: Add Page Deallocation Table (PDT) support

2017-05-12T07:14:15Z

The firmare in most parisc machines maintains a Page Deallocation Table (PDT) which holds a list of physical memory addresses where hardware detected memory errors (single bit and double bit errors). This patch adds the missing PDC firmware calls and the logic to read the PDT from firmware, report all current PDT entries and exclude the reported bad memory from being used by Linux. Signed-off-by: Helge Deller

parisc: Enhance CPU detection code on PAT machines

2016-12-12T21:28:09Z

This patch fixes the debug code which runs during the inventory scan on machines with PAT firmware. Additionally print out the relationship between the detected logical CPU number and it's physical location and physical cpu number. This leads to information which can be used to feed numa-structures in the kernel in later patches. An example output is from my single-CPU (2 cores) C8000 machine is: Logical CPU #0 is physical cpu #0 at 0xffff0000ffff15, hpa 0xfffffffffe780000 Logical CPU #1 is physical cpu #1 at 0xffff0000ffff15, hpa 0xfffffffffe781000 Signed-off-by: Helge Deller

parisc: Add break statements to pdc_pat_io_pci_cfg_read()

2016-08-02T14:44:33Z

Dan Carpenter noticed that pdc_pat_io_pci_cfg_read() is problematic because it's missing some break statements so it copies 4 bytes regardless of whether you asked for only 1 or 2. Reported-by: Dan Carpenter Signed-off-by: Helge Deller