675 lines
18 KiB
C
675 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* inventory.c
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*
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* Copyright (c) 1999 The Puffin Group (David Kennedy and Alex deVries)
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* Copyright (c) 2001 Matthew Wilcox for Hewlett-Packard
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*
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* These are the routines to discover what hardware exists in this box.
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* This task is complicated by there being 3 different ways of
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* performing an inventory, depending largely on the age of the box.
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* The recommended way to do this is to check to see whether the machine
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* is a `Snake' first, then try System Map, then try PAT. We try System
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* Map before checking for a Snake -- this probably doesn't cause any
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* problems, but...
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/platform_device.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/mmzone.h>
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#include <asm/pdc.h>
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#include <asm/pdcpat.h>
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#include <asm/processor.h>
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#include <asm/page.h>
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#include <asm/parisc-device.h>
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#include <asm/tlbflush.h>
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/*
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** Debug options
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** DEBUG_PAT Dump details which PDC PAT provides about ranges/devices.
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*/
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#undef DEBUG_PAT
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int pdc_type __ro_after_init = PDC_TYPE_ILLEGAL;
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/* cell number and location (PAT firmware only) */
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unsigned long parisc_cell_num __ro_after_init;
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unsigned long parisc_cell_loc __ro_after_init;
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unsigned long parisc_pat_pdc_cap __ro_after_init;
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void __init setup_pdc(void)
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{
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long status;
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unsigned int bus_id;
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struct pdc_system_map_mod_info module_result;
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struct pdc_module_path module_path;
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struct pdc_model model;
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#ifdef CONFIG_64BIT
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struct pdc_pat_cell_num cell_info;
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#endif
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/* Determine the pdc "type" used on this machine */
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printk(KERN_INFO "Determining PDC firmware type: ");
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status = pdc_system_map_find_mods(&module_result, &module_path, 0);
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if (status == PDC_OK) {
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pdc_type = PDC_TYPE_SYSTEM_MAP;
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pr_cont("System Map.\n");
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return;
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}
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/*
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* If the machine doesn't support PDC_SYSTEM_MAP then either it
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* is a pdc pat box, or it is an older box. All 64 bit capable
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* machines are either pdc pat boxes or they support PDC_SYSTEM_MAP.
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*/
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/*
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* TODO: We should test for 64 bit capability and give a
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* clearer message.
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*/
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#ifdef CONFIG_64BIT
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status = pdc_pat_cell_get_number(&cell_info);
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if (status == PDC_OK) {
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unsigned long legacy_rev, pat_rev;
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pdc_type = PDC_TYPE_PAT;
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pr_cont("64 bit PAT.\n");
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parisc_cell_num = cell_info.cell_num;
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parisc_cell_loc = cell_info.cell_loc;
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pr_info("PAT: Running on cell %lu and location %lu.\n",
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parisc_cell_num, parisc_cell_loc);
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status = pdc_pat_pd_get_pdc_revisions(&legacy_rev,
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&pat_rev, &parisc_pat_pdc_cap);
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pr_info("PAT: legacy revision 0x%lx, pat_rev 0x%lx, pdc_cap 0x%lx, S-PTLB %d, HPMC_RENDEZ %d.\n",
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legacy_rev, pat_rev, parisc_pat_pdc_cap,
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parisc_pat_pdc_cap
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& PDC_PAT_CAPABILITY_BIT_SIMULTANEOUS_PTLB ? 1:0,
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parisc_pat_pdc_cap
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& PDC_PAT_CAPABILITY_BIT_PDC_HPMC_RENDEZ ? 1:0);
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return;
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}
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#endif
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/* Check the CPU's bus ID. There's probably a better test. */
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status = pdc_model_info(&model);
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bus_id = (model.hversion >> (4 + 7)) & 0x1f;
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switch (bus_id) {
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case 0x4: /* 720, 730, 750, 735, 755 */
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case 0x6: /* 705, 710 */
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case 0x7: /* 715, 725 */
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case 0x8: /* 745, 747, 742 */
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case 0xA: /* 712 and similar */
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case 0xC: /* 715/64, at least */
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pdc_type = PDC_TYPE_SNAKE;
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pr_cont("Snake.\n");
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return;
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default: /* Everything else */
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pr_cont("Unsupported.\n");
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panic("If this is a 64-bit machine, please try a 64-bit kernel.\n");
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}
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}
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#define PDC_PAGE_ADJ_SHIFT (PAGE_SHIFT - 12) /* pdc pages are always 4k */
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static void __init
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set_pmem_entry(physmem_range_t *pmem_ptr, unsigned long start,
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unsigned long pages4k)
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{
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/* Rather than aligning and potentially throwing away
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* memory, we'll assume that any ranges are already
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* nicely aligned with any reasonable page size, and
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* panic if they are not (it's more likely that the
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* pdc info is bad in this case).
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*/
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if (unlikely( ((start & (PAGE_SIZE - 1)) != 0)
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|| ((pages4k & ((1UL << PDC_PAGE_ADJ_SHIFT) - 1)) != 0) )) {
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panic("Memory range doesn't align with page size!\n");
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}
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pmem_ptr->start_pfn = (start >> PAGE_SHIFT);
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pmem_ptr->pages = (pages4k >> PDC_PAGE_ADJ_SHIFT);
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}
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static void __init pagezero_memconfig(void)
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{
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unsigned long npages;
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/* Use the 32 bit information from page zero to create a single
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* entry in the pmem_ranges[] table.
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*
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* We currently don't support machines with contiguous memory
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* >= 4 Gb, who report that memory using 64 bit only fields
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* on page zero. It's not worth doing until it can be tested,
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* and it is not clear we can support those machines for other
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* reasons.
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*
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* If that support is done in the future, this is where it
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* should be done.
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*/
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npages = (PAGE_ALIGN(PAGE0->imm_max_mem) >> PAGE_SHIFT);
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set_pmem_entry(pmem_ranges,0UL,npages);
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npmem_ranges = 1;
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}
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#ifdef CONFIG_64BIT
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/* All of the PDC PAT specific code is 64-bit only */
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/*
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** The module object is filled via PDC_PAT_CELL[Return Cell Module].
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** If a module is found, register module will get the IODC bytes via
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** pdc_iodc_read() using the PA view of conf_base_addr for the hpa parameter.
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**
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** The IO view can be used by PDC_PAT_CELL[Return Cell Module]
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** only for SBAs and LBAs. This view will cause an invalid
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** argument error for all other cell module types.
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**
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*/
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static int __init
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pat_query_module(ulong pcell_loc, ulong mod_index)
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{
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pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell;
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unsigned long bytecnt;
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unsigned long temp; /* 64-bit scratch value */
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long status; /* PDC return value status */
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struct parisc_device *dev;
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pa_pdc_cell = kmalloc(sizeof (*pa_pdc_cell), GFP_KERNEL);
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if (!pa_pdc_cell)
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panic("couldn't allocate memory for PDC_PAT_CELL!");
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/* return cell module (PA or Processor view) */
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status = pdc_pat_cell_module(&bytecnt, pcell_loc, mod_index,
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PA_VIEW, pa_pdc_cell);
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if (status != PDC_OK) {
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/* no more cell modules or error */
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kfree(pa_pdc_cell);
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return status;
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}
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temp = pa_pdc_cell->cba;
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dev = alloc_pa_dev(PAT_GET_CBA(temp), &(pa_pdc_cell->mod_path));
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if (!dev) {
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kfree(pa_pdc_cell);
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return PDC_OK;
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}
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/* alloc_pa_dev sets dev->hpa */
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/*
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** save parameters in the parisc_device
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** (The idea being the device driver will call pdc_pat_cell_module()
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** and store the results in its own data structure.)
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*/
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dev->pcell_loc = pcell_loc;
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dev->mod_index = mod_index;
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/* save generic info returned from the call */
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/* REVISIT: who is the consumer of this? not sure yet... */
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dev->mod_info = pa_pdc_cell->mod_info; /* pass to PAT_GET_ENTITY() */
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dev->pmod_loc = pa_pdc_cell->mod_location;
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dev->mod0 = pa_pdc_cell->mod[0];
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register_parisc_device(dev); /* advertise device */
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#ifdef DEBUG_PAT
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/* dump what we see so far... */
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switch (PAT_GET_ENTITY(dev->mod_info)) {
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pdc_pat_cell_mod_maddr_block_t io_pdc_cell;
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unsigned long i;
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case PAT_ENTITY_PROC:
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printk(KERN_DEBUG "PAT_ENTITY_PROC: id_eid 0x%lx\n",
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pa_pdc_cell->mod[0]);
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break;
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case PAT_ENTITY_MEM:
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printk(KERN_DEBUG
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"PAT_ENTITY_MEM: amount 0x%lx min_gni_base 0x%lx min_gni_len 0x%lx\n",
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pa_pdc_cell->mod[0], pa_pdc_cell->mod[1],
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pa_pdc_cell->mod[2]);
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break;
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case PAT_ENTITY_CA:
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printk(KERN_DEBUG "PAT_ENTITY_CA: %ld\n", pcell_loc);
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break;
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case PAT_ENTITY_PBC:
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printk(KERN_DEBUG "PAT_ENTITY_PBC: ");
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goto print_ranges;
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case PAT_ENTITY_SBA:
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printk(KERN_DEBUG "PAT_ENTITY_SBA: ");
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goto print_ranges;
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case PAT_ENTITY_LBA:
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printk(KERN_DEBUG "PAT_ENTITY_LBA: ");
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print_ranges:
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pdc_pat_cell_module(&bytecnt, pcell_loc, mod_index,
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IO_VIEW, &io_pdc_cell);
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printk(KERN_DEBUG "ranges %ld\n", pa_pdc_cell->mod[1]);
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for (i = 0; i < pa_pdc_cell->mod[1]; i++) {
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printk(KERN_DEBUG
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" PA_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n",
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i, pa_pdc_cell->mod[2 + i * 3], /* type */
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pa_pdc_cell->mod[3 + i * 3], /* start */
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pa_pdc_cell->mod[4 + i * 3]); /* finish (ie end) */
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printk(KERN_DEBUG
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" IO_VIEW %ld: 0x%016lx 0x%016lx 0x%016lx\n",
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i, io_pdc_cell.mod[2 + i * 3], /* type */
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io_pdc_cell.mod[3 + i * 3], /* start */
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io_pdc_cell.mod[4 + i * 3]); /* finish (ie end) */
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}
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printk(KERN_DEBUG "\n");
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break;
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}
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#endif /* DEBUG_PAT */
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kfree(pa_pdc_cell);
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return PDC_OK;
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}
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/* pat pdc can return information about a variety of different
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* types of memory (e.g. firmware,i/o, etc) but we only care about
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* the usable physical ram right now. Since the firmware specific
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* information is allocated on the stack, we'll be generous, in
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* case there is a lot of other information we don't care about.
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*/
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#define PAT_MAX_RANGES (4 * MAX_PHYSMEM_RANGES)
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static void __init pat_memconfig(void)
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{
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unsigned long actual_len;
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struct pdc_pat_pd_addr_map_entry mem_table[PAT_MAX_RANGES+1];
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struct pdc_pat_pd_addr_map_entry *mtbl_ptr;
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physmem_range_t *pmem_ptr;
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long status;
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int entries;
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unsigned long length;
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int i;
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length = (PAT_MAX_RANGES + 1) * sizeof(struct pdc_pat_pd_addr_map_entry);
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status = pdc_pat_pd_get_addr_map(&actual_len, mem_table, length, 0L);
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if ((status != PDC_OK)
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|| ((actual_len % sizeof(struct pdc_pat_pd_addr_map_entry)) != 0)) {
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/* The above pdc call shouldn't fail, but, just in
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* case, just use the PAGE0 info.
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*/
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printk("\n\n\n");
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printk(KERN_WARNING "WARNING! Could not get full memory configuration. "
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"All memory may not be used!\n\n\n");
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pagezero_memconfig();
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return;
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}
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entries = actual_len / sizeof(struct pdc_pat_pd_addr_map_entry);
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if (entries > PAT_MAX_RANGES) {
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printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
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printk(KERN_WARNING "Some memory may not be used!\n");
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}
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/* Copy information into the firmware independent pmem_ranges
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* array, skipping types we don't care about. Notice we said
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* "may" above. We'll use all the entries that were returned.
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*/
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npmem_ranges = 0;
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mtbl_ptr = mem_table;
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pmem_ptr = pmem_ranges; /* Global firmware independent table */
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for (i = 0; i < entries; i++,mtbl_ptr++) {
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if ( (mtbl_ptr->entry_type != PAT_MEMORY_DESCRIPTOR)
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|| (mtbl_ptr->memory_type != PAT_MEMTYPE_MEMORY)
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|| (mtbl_ptr->pages == 0)
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|| ( (mtbl_ptr->memory_usage != PAT_MEMUSE_GENERAL)
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&& (mtbl_ptr->memory_usage != PAT_MEMUSE_GI)
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&& (mtbl_ptr->memory_usage != PAT_MEMUSE_GNI) ) ) {
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continue;
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}
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if (npmem_ranges == MAX_PHYSMEM_RANGES) {
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printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
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printk(KERN_WARNING "Some memory will not be used!\n");
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break;
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}
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set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);
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npmem_ranges++;
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}
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}
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static int __init pat_inventory(void)
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{
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int status;
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ulong mod_index = 0;
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struct pdc_pat_cell_num cell_info;
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/*
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** Note: Prelude (and it's successors: Lclass, A400/500) only
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** implement PDC_PAT_CELL sub-options 0 and 2.
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*/
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status = pdc_pat_cell_get_number(&cell_info);
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if (status != PDC_OK) {
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return 0;
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}
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#ifdef DEBUG_PAT
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printk(KERN_DEBUG "CELL_GET_NUMBER: 0x%lx 0x%lx\n", cell_info.cell_num,
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cell_info.cell_loc);
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#endif
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while (PDC_OK == pat_query_module(cell_info.cell_loc, mod_index)) {
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mod_index++;
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}
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return mod_index;
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}
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/* We only look for extended memory ranges on a 64 bit capable box */
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static void __init sprockets_memconfig(void)
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{
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struct pdc_memory_table_raddr r_addr;
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struct pdc_memory_table mem_table[MAX_PHYSMEM_RANGES];
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struct pdc_memory_table *mtbl_ptr;
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physmem_range_t *pmem_ptr;
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long status;
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int entries;
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int i;
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status = pdc_mem_mem_table(&r_addr,mem_table,
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(unsigned long)MAX_PHYSMEM_RANGES);
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if (status != PDC_OK) {
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/* The above pdc call only works on boxes with sprockets
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* firmware (newer B,C,J class). Other non PAT PDC machines
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* do support more than 3.75 Gb of memory, but we don't
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* support them yet.
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*/
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pagezero_memconfig();
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return;
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}
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if (r_addr.entries_total > MAX_PHYSMEM_RANGES) {
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printk(KERN_WARNING "This Machine has more memory ranges than we support!\n");
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printk(KERN_WARNING "Some memory will not be used!\n");
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}
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entries = (int)r_addr.entries_returned;
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npmem_ranges = 0;
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mtbl_ptr = mem_table;
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pmem_ptr = pmem_ranges; /* Global firmware independent table */
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for (i = 0; i < entries; i++,mtbl_ptr++) {
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set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);
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npmem_ranges++;
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}
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}
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#else /* !CONFIG_64BIT */
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#define pat_inventory() do { } while (0)
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#define pat_memconfig() do { } while (0)
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#define sprockets_memconfig() pagezero_memconfig()
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#endif /* !CONFIG_64BIT */
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#ifndef CONFIG_PA20
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/* Code to support Snake machines (7[2350], 7[235]5, 715/Scorpio) */
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static struct parisc_device * __init
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legacy_create_device(struct pdc_memory_map *r_addr,
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struct pdc_module_path *module_path)
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{
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struct parisc_device *dev;
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int status = pdc_mem_map_hpa(r_addr, module_path);
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if (status != PDC_OK)
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return NULL;
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dev = alloc_pa_dev(r_addr->hpa, &module_path->path);
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if (dev == NULL)
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return NULL;
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register_parisc_device(dev);
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return dev;
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}
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/**
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* snake_inventory
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*
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* Before PDC_SYSTEM_MAP was invented, the PDC_MEM_MAP call was used.
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* To use it, we initialise the mod_path.bc to 0xff and try all values of
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* mod to get the HPA for the top-level devices. Bus adapters may have
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* sub-devices which are discovered by setting bc[5] to 0 and bc[4] to the
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* module, then trying all possible functions.
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*/
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static void __init snake_inventory(void)
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{
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int mod;
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for (mod = 0; mod < 16; mod++) {
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struct parisc_device *dev;
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struct pdc_module_path module_path;
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struct pdc_memory_map r_addr;
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unsigned int func;
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memset(module_path.path.bc, 0xff, 6);
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module_path.path.mod = mod;
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dev = legacy_create_device(&r_addr, &module_path);
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if ((!dev) || (dev->id.hw_type != HPHW_BA))
|
|
continue;
|
|
|
|
memset(module_path.path.bc, 0xff, 4);
|
|
module_path.path.bc[4] = mod;
|
|
|
|
for (func = 0; func < 16; func++) {
|
|
module_path.path.bc[5] = 0;
|
|
module_path.path.mod = func;
|
|
legacy_create_device(&r_addr, &module_path);
|
|
}
|
|
}
|
|
}
|
|
|
|
#else /* CONFIG_PA20 */
|
|
#define snake_inventory() do { } while (0)
|
|
#endif /* CONFIG_PA20 */
|
|
|
|
/* Common 32/64 bit based code goes here */
|
|
|
|
/**
|
|
* add_system_map_addresses - Add additional addresses to the parisc device.
|
|
* @dev: The parisc device.
|
|
* @num_addrs: Then number of addresses to add;
|
|
* @module_instance: The system_map module instance.
|
|
*
|
|
* This function adds any additional addresses reported by the system_map
|
|
* firmware to the parisc device.
|
|
*/
|
|
static void __init
|
|
add_system_map_addresses(struct parisc_device *dev, int num_addrs,
|
|
int module_instance)
|
|
{
|
|
int i;
|
|
long status;
|
|
struct pdc_system_map_addr_info addr_result;
|
|
|
|
dev->addr = kmalloc_array(num_addrs, sizeof(*dev->addr), GFP_KERNEL);
|
|
if(!dev->addr) {
|
|
printk(KERN_ERR "%s %s(): memory allocation failure\n",
|
|
__FILE__, __func__);
|
|
return;
|
|
}
|
|
|
|
for(i = 1; i <= num_addrs; ++i) {
|
|
status = pdc_system_map_find_addrs(&addr_result,
|
|
module_instance, i);
|
|
if(PDC_OK == status) {
|
|
dev->addr[dev->num_addrs] = (unsigned long)addr_result.mod_addr;
|
|
dev->num_addrs++;
|
|
} else {
|
|
printk(KERN_WARNING
|
|
"Bad PDC_FIND_ADDRESS status return (%ld) for index %d\n",
|
|
status, i);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* system_map_inventory - Retrieve firmware devices via SYSTEM_MAP.
|
|
*
|
|
* This function attempts to retrieve and register all the devices firmware
|
|
* knows about via the SYSTEM_MAP PDC call.
|
|
*/
|
|
static void __init system_map_inventory(void)
|
|
{
|
|
int i;
|
|
long status = PDC_OK;
|
|
|
|
for (i = 0; i < 256; i++) {
|
|
struct parisc_device *dev;
|
|
struct pdc_system_map_mod_info module_result;
|
|
struct pdc_module_path module_path;
|
|
|
|
status = pdc_system_map_find_mods(&module_result,
|
|
&module_path, i);
|
|
if ((status == PDC_BAD_PROC) || (status == PDC_NE_MOD))
|
|
break;
|
|
if (status != PDC_OK)
|
|
continue;
|
|
|
|
dev = alloc_pa_dev(module_result.mod_addr, &module_path.path);
|
|
if (!dev)
|
|
continue;
|
|
|
|
register_parisc_device(dev);
|
|
|
|
/* if available, get the additional addresses for a module */
|
|
if (!module_result.add_addrs)
|
|
continue;
|
|
|
|
add_system_map_addresses(dev, module_result.add_addrs, i);
|
|
}
|
|
|
|
walk_central_bus();
|
|
return;
|
|
}
|
|
|
|
void __init do_memory_inventory(void)
|
|
{
|
|
switch (pdc_type) {
|
|
|
|
case PDC_TYPE_PAT:
|
|
pat_memconfig();
|
|
break;
|
|
|
|
case PDC_TYPE_SYSTEM_MAP:
|
|
sprockets_memconfig();
|
|
break;
|
|
|
|
case PDC_TYPE_SNAKE:
|
|
pagezero_memconfig();
|
|
return;
|
|
|
|
default:
|
|
panic("Unknown PDC type!\n");
|
|
}
|
|
|
|
if (npmem_ranges == 0 || pmem_ranges[0].start_pfn != 0) {
|
|
printk(KERN_WARNING "Bad memory configuration returned!\n");
|
|
printk(KERN_WARNING "Some memory may not be used!\n");
|
|
pagezero_memconfig();
|
|
}
|
|
}
|
|
|
|
void __init do_device_inventory(void)
|
|
{
|
|
printk(KERN_INFO "Searching for devices...\n");
|
|
|
|
init_parisc_bus();
|
|
|
|
switch (pdc_type) {
|
|
|
|
case PDC_TYPE_PAT:
|
|
pat_inventory();
|
|
break;
|
|
|
|
case PDC_TYPE_SYSTEM_MAP:
|
|
system_map_inventory();
|
|
break;
|
|
|
|
case PDC_TYPE_SNAKE:
|
|
snake_inventory();
|
|
break;
|
|
|
|
default:
|
|
panic("Unknown PDC type!\n");
|
|
}
|
|
printk(KERN_INFO "Found devices:\n");
|
|
print_parisc_devices();
|
|
|
|
#if defined(CONFIG_64BIT) && defined(CONFIG_SMP)
|
|
pa_serialize_tlb_flushes = machine_has_merced_bus();
|
|
if (pa_serialize_tlb_flushes)
|
|
pr_info("Merced bus found: Enable PxTLB serialization.\n");
|
|
#endif
|
|
|
|
#if defined(CONFIG_FW_CFG_SYSFS)
|
|
if (running_on_qemu) {
|
|
struct resource res[3] = {0,};
|
|
unsigned int base;
|
|
|
|
base = ((unsigned long long) PAGE0->pad0[2] << 32)
|
|
| PAGE0->pad0[3]; /* SeaBIOS stored it here */
|
|
|
|
res[0].name = "fw_cfg";
|
|
res[0].start = base;
|
|
res[0].end = base + 8 - 1;
|
|
res[0].flags = IORESOURCE_MEM;
|
|
|
|
res[1].name = "ctrl";
|
|
res[1].start = 0;
|
|
res[1].flags = IORESOURCE_REG;
|
|
|
|
res[2].name = "data";
|
|
res[2].start = 4;
|
|
res[2].flags = IORESOURCE_REG;
|
|
|
|
if (base) {
|
|
pr_info("Found qemu fw_cfg interface at %#08x\n", base);
|
|
platform_device_register_simple("fw_cfg",
|
|
PLATFORM_DEVID_NONE, res, 3);
|
|
}
|
|
}
|
|
#endif
|
|
}
|