1 // SPDX-License-Identifier: GPL-2.0-or-later
6  * Copyright (c) 2001 Matthew Wilcox for Hewlett-Packard
13  * Map before checking for a Snake -- this probably doesn't cause any
26 #include <asm/pdc.h>
30 #include <asm/parisc-device.h>
35 ** DEBUG_PAT Dump details which PDC PAT provides about ranges/devices.
58 	/* Determine the pdc "type" used on this machine */  in setup_pdc()
60 	printk(KERN_INFO "Determining PDC firmware type: ");  in setup_pdc()
71 	 * is a pdc pat box, or it is an older box. All 64 bit capable  in setup_pdc()
72 	 * machines are either pdc pat boxes or they support PDC_SYSTEM_MAP.  in setup_pdc()
92 		pr_info("PAT: legacy revision 0x%lx, pat_rev 0x%lx, pdc_cap 0x%lx, S-PTLB %d, HPMC_RENDEZ %d.\n",  in setup_pdc()
123 		panic("If this is a 64-bit machine, please try a 64-bit kernel.\n");  in setup_pdc()
127 #define PDC_PAGE_ADJ_SHIFT (PAGE_SHIFT - 12) /* pdc pages are always 4k */
137 	 * pdc info is bad in this case).  in set_pmem_entry()
140 	if (unlikely( ((start & (PAGE_SIZE - 1)) != 0)  in set_pmem_entry()
141 	    || ((pages4k & ((1UL << PDC_PAGE_ADJ_SHIFT) - 1)) != 0) )) {  in set_pmem_entry()
146 	pmem_ptr->start_pfn = (start >> PAGE_SHIFT);  in set_pmem_entry()
147 	pmem_ptr->pages = (pages4k >> PDC_PAGE_ADJ_SHIFT);  in set_pmem_entry()
167 	npages = (PAGE_ALIGN(PAGE0->imm_max_mem) >> PAGE_SHIFT);  in pagezero_memconfig()
174 /* All of the PDC PAT specific code is 64-bit only */
192 	unsigned long temp;	/* 64-bit scratch value */  in pat_query_module()
193 	long status;		/* PDC return value status */  in pat_query_module()
210 	temp = pa_pdc_cell->cba;  in pat_query_module()
211 	dev = alloc_pa_dev(PAT_GET_CBA(temp), &(pa_pdc_cell->mod_path));  in pat_query_module()
217 	/* alloc_pa_dev sets dev->hpa */  in pat_query_module()
224 	dev->pcell_loc = pcell_loc;  in pat_query_module()
225 	dev->mod_index = mod_index;  in pat_query_module()
229 	dev->mod_info = pa_pdc_cell->mod_info;	/* pass to PAT_GET_ENTITY() */  in pat_query_module()
230 	dev->pmod_loc = pa_pdc_cell->mod_location;  in pat_query_module()
231 	dev->mod0 = pa_pdc_cell->mod[0];  in pat_query_module()
237 	switch (PAT_GET_ENTITY(dev->mod_info)) {  in pat_query_module()
243 			pa_pdc_cell->mod[0]);  in pat_query_module()
249 			pa_pdc_cell->mod[0], pa_pdc_cell->mod[1],  in pat_query_module()
250 			pa_pdc_cell->mod[2]);  in pat_query_module()
270 		printk(KERN_DEBUG "ranges %ld\n", pa_pdc_cell->mod[1]);  in pat_query_module()
271 		for (i = 0; i < pa_pdc_cell->mod[1]; i++) {  in pat_query_module()
274 				i, pa_pdc_cell->mod[2 + i * 3],	/* type */  in pat_query_module()
275 				pa_pdc_cell->mod[3 + i * 3],	/* start */  in pat_query_module()
276 				pa_pdc_cell->mod[4 + i * 3]);	/* finish (ie end) */  in pat_query_module()
294 /* pat pdc can return information about a variety of different
321 		/* The above pdc call shouldn't fail, but, just in  in pat_memconfig()
346 	pmem_ptr = pmem_ranges; /* Global firmware independent table */  in pat_memconfig()
348 		if (   (mtbl_ptr->entry_type != PAT_MEMORY_DESCRIPTOR)  in pat_memconfig()
349 		    || (mtbl_ptr->memory_type != PAT_MEMTYPE_MEMORY)  in pat_memconfig()
350 		    || (mtbl_ptr->pages == 0)  in pat_memconfig()
351 		    || (   (mtbl_ptr->memory_usage != PAT_MEMUSE_GENERAL)  in pat_memconfig()
352 			&& (mtbl_ptr->memory_usage != PAT_MEMUSE_GI)  in pat_memconfig()
353 			&& (mtbl_ptr->memory_usage != PAT_MEMUSE_GNI) ) ) {  in pat_memconfig()
364 		set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);  in pat_memconfig()
377 	**        implement PDC_PAT_CELL sub-options 0 and 2.  in pat_inventory()
412 		/* The above pdc call only works on boxes with sprockets  in sprockets_memconfig()
413 		 * firmware (newer B,C,J class). Other non PAT PDC machines  in sprockets_memconfig()
431 	pmem_ptr = pmem_ranges; /* Global firmware independent table */  in sprockets_memconfig()
433 		set_pmem_entry(pmem_ptr++,mtbl_ptr->paddr,mtbl_ptr->pages);  in sprockets_memconfig()
460 	dev = alloc_pa_dev(r_addr->hpa, &module_path->path);  in legacy_create_device()
473  * mod to get the HPA for the top-level devices.  Bus adapters may have
474  * sub-devices which are discovered by setting bc[5] to 0 and bc[4] to the
489 		if ((!dev) || (dev->id.hw_type != HPHW_BA))  in snake_inventory()
510  * add_system_map_addresses - Add additional addresses to the parisc device.
526 	dev->addr = kmalloc_array(num_addrs, sizeof(*dev->addr), GFP_KERNEL);  in add_system_map_addresses()
527 	if(!dev->addr) {  in add_system_map_addresses()
537 			dev->addr[dev->num_addrs] = (unsigned long)addr_result.mod_addr;  in add_system_map_addresses()
538 			dev->num_addrs++;  in add_system_map_addresses()
548  * system_map_inventory - Retrieve firmware devices via SYSTEM_MAP.
551  * knows about via the SYSTEM_MAP PDC call.
604 		panic("Unknown PDC type!\n");  in do_memory_inventory()
635 		panic("Unknown PDC type!\n");  in do_device_inventory()
651 		base = ((unsigned long long) PAGE0->pad0[2] << 32)  in do_device_inventory()
652 			| PAGE0->pad0[3]; /* SeaBIOS stored it here */  in do_device_inventory()
656 		res[0].end = base + 8 - 1;  in do_device_inventory()