1 // SPDX-License-Identifier: GPL-2.0-or-later
6  * Copyright (C) 1996-2005 Paul Mackerras.
45 #include <asm/iommu.h>
49 #include <asm/pci-bridge.h>
94  * overlaps_initrd - check for overlap with page aligned extension of
111  * move_device_tree - move tree to an unused area, if needed.
122 	DBG("-> move_device_tree\n");  in move_device_tree()
128 	    !memblock_is_memory(start + size - 1) ||  in move_device_tree()
139 	DBG("<- move_device_tree\n");  in move_device_tree()
143  * ibm,pa/pi-features is a per-cpu property that contains a string of
147  * Second header byte is an "attribute-specifier" type, of which
148  * zero is the only currently-defined value.
150  * that we are interested in.  The function will return -1 if the
151  * pa-features property is missing, or a 1/0 to indicate if the feature
153  * big-endian to match the definition in PAPR.
155  * ibm,pa/pi-features property, it does not set the feature if the
163 	unsigned char	pabyte;		/* byte number in ibm,pa/pi-features */
164 	unsigned char	pabit;		/* bit number (big-endian) */
192  * ibm,pi-features property provides the support of processor specific
193  * options not described in ibm,pa-features. Right now use byte 0, bit 3
218 		tablelen -= len;  in scan_features()
224 		if (fp->pabyte >= ftrs[0])  in scan_features()
226 		bit = (ftrs[2 + fp->pabyte] >> (7 - fp->pabit)) & 1;  in scan_features()
227 		if (bit && !fp->clear) {  in scan_features()
228 			cur_cpu_spec->cpu_features |= fp->cpu_features;  in scan_features()
229 			cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftrs;  in scan_features()
230 			cur_cpu_spec->cpu_user_features2 |= fp->cpu_user_ftrs2;  in scan_features()
231 			cur_cpu_spec->mmu_features |= fp->mmu_features;  in scan_features()
232 		} else if (bit == fp->clear) {  in scan_features()
233 			cur_cpu_spec->cpu_features &= ~fp->cpu_features;  in scan_features()
234 			cur_cpu_spec->cpu_user_features &= ~fp->cpu_user_ftrs;  in scan_features()
235 			cur_cpu_spec->cpu_user_features2 &= ~fp->cpu_user_ftrs2;  in scan_features()
236 			cur_cpu_spec->mmu_features &= ~fp->mmu_features;  in scan_features()
260 	slb_size_ptr = of_get_flat_dt_prop(node, "slb-size", NULL) ? :  in init_mmu_slb_size()
261 			of_get_flat_dt_prop(node, "ibm,slb-size", NULL);  in init_mmu_slb_size()
305 		pvr = cur_cpu_spec->pvr_value | 0x8;  in identical_pvr_fixup()
321 		prop = of_get_flat_dt_prop(node, fp->name, NULL);  in check_cpu_feature_properties()
322 		if (prop && be32_to_cpup(prop) >= fp->min_value) {  in check_cpu_feature_properties()
323 			cur_cpu_spec->cpu_features |= fp->cpu_feature;  in check_cpu_feature_properties()
324 			cur_cpu_spec->cpu_user_features |= fp->cpu_user_ftr;  in check_cpu_feature_properties()
339 	int found = -1;  in early_init_dt_scan_cpus()
350 	intserv = of_get_flat_dt_prop(node, "ibm,ppc-interrupt-server#s", &len);  in early_init_dt_scan_cpus()
406 	 * If the cpu-version property in the cpu node contains  in early_init_dt_scan_cpus()
416 	 * support the cpu-version property, and it's the responsibility of the  in early_init_dt_scan_cpus()
418 	 * architecture level via the ibm,powerpc-cpu-features binding.  in early_init_dt_scan_cpus()
421 		prop = of_get_flat_dt_prop(node, "cpu-version", NULL);  in early_init_dt_scan_cpus()
428 		check_cpu_features(node, "ibm,pa-features", ibm_pa_features,  in early_init_dt_scan_cpus()
430 		check_cpu_features(node, "ibm,pi-features", ibm_pi_features,  in early_init_dt_scan_cpus()
437 	seq_buf_printf(&ppc_hw_desc, "%s 0x%04lx ", cur_cpu_spec->cpu_name, mfspr(SPRN_PVR));  in early_init_dt_scan_cpus()
445 		cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT;  in early_init_dt_scan_cpus()
447 		cur_cpu_spec->cpu_features |= CPU_FTR_SMT;  in early_init_dt_scan_cpus()
464 	/* check if iommu is forced on or off */  in early_init_dt_scan_chosen_ppc()
465 	if (of_get_flat_dt_prop(node, "linux,iommu-off", NULL) != NULL)  in early_init_dt_scan_chosen_ppc()
467 	if (of_get_flat_dt_prop(node, "linux,iommu-force-on", NULL) != NULL)  in early_init_dt_scan_chosen_ppc()
472 	lprop = of_get_flat_dt_prop(node, "linux,memory-limit", NULL);  in early_init_dt_scan_chosen_ppc()
477 	lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-start", NULL);  in early_init_dt_scan_chosen_ppc()
480 	lprop = of_get_flat_dt_prop(node, "linux,tce-alloc-end", NULL);  in early_init_dt_scan_chosen_ppc()
486 	lprop = of_get_flat_dt_prop(node, "linux,crashkernel-base", NULL);  in early_init_dt_scan_chosen_ppc()
490 	lprop = of_get_flat_dt_prop(node, "linux,crashkernel-size", NULL);  in early_init_dt_scan_chosen_ppc()
492 		crashk_res.end = crashk_res.start + *lprop - 1;  in early_init_dt_scan_chosen_ppc()
512 		*size = max_mem - base;  in validate_mem_limit()
535 	base = lmb->base_addr;  in early_init_drmem_lmb()
543 	if ((lmb->flags & DRCONF_MEM_RESERVED) ||  in early_init_drmem_lmb()
544 	    !(lmb->flags & DRCONF_MEM_ASSIGNED))  in early_init_drmem_lmb()
552 		 * For each memblock in ibm,dynamic-memory, a  in early_init_drmem_lmb()
553 		 * corresponding entry in linux,drconf-usable-memory  in early_init_drmem_lmb()
556 		 * linux,drconf-usable-memory property  in early_init_drmem_lmb()
573 				size = 0x80000000ul - base;  in early_init_drmem_lmb()
579 		DBG("Adding: %llx -> %llx\n", base, size);  in early_init_drmem_lmb()
582 		if (lmb->flags & DRCONF_MEM_HOTREMOVABLE)  in early_init_drmem_lmb()
584 	} while (--rngs);  in early_init_drmem_lmb()
594 	int node = fdt_path_offset(fdt, "/ibm,dynamic-reconfiguration-memory");  in early_init_dt_scan_memory_ppc()
625 			size = 0x80000000ul - base;  in early_init_dt_add_memory_arch()
628 	/* Keep track of the beginning of memory -and- the size of  in early_init_dt_add_memory_arch()
629 	 * the very first block in the device-tree as it represents  in early_init_dt_add_memory_arch()
655 	prop = of_get_flat_dt_prop(dt_root, "reserved-ranges", &len);  in early_reserve_mem_dt()
660 	DBG("Found new-style reserved-ranges\n");  in early_reserve_mem_dt()
671 			DBG("reserving: %llx -> %llx\n", base, size);  in early_reserve_mem_dt()
684 	/* Look for the new "reserved-regions" property in the DT */  in early_reserve_mem()
691 			ALIGN(initrd_end, PAGE_SIZE) -  in early_reserve_mem()
701 	 * image that setup the mem_rsvmap as pairs of 32-bit values  in early_reserve_mem()
707 		DBG("Found old 32-bit reserve map\n");  in early_reserve_mem()
714 			DBG("reserving: %x -> %x\n", base_32, size_32);  in early_reserve_mem()
729 		return -EINVAL;  in parse_ppc_tm()
741 		cur_cpu_spec->cpu_user_features2 &=  in tm_init()
743 		cur_cpu_spec->cpu_features &= ~CPU_FTR_TM;  in tm_init()
791 	DBG(" -> early_init_devtree(%px)\n", params);  in early_init_devtree()
818 	 * device-tree, including the platform type, initrd location and  in early_init_devtree()
844 	memblock_reserve(PHYSICAL_START, __pa(_end) - PHYSICAL_START);  in early_init_devtree()
847 	int_vector_size = __end_interrupts - _stext;  in early_init_devtree()
858 	 * If we fail to reserve memory for firmware-assisted dump then  in early_init_devtree()
904 	 * NCPUS-1 non-boot CPUs  :-)  in early_init_devtree()
906 	spinning_secondaries = boot_cpu_count - 1;  in early_init_devtree()
939 	DBG(" <- early_init_devtree()\n");  in early_init_devtree()
949 	/* Setup flat device-tree pointer */  in early_get_first_memblock_info()
978  * of_get_ibm_chip_id - Returns the IBM "chip-id" of a device
981  * This looks for a property "ibm,chip-id" in the node or any
982  * of its parents and returns its content, or -1 if it cannot
993 		 * cell in chip-id, we only read the first one here.  in of_get_ibm_chip_id()
995 		if (!of_property_read_u32(np, "ibm,chip-id", &chip_id)) {  in of_get_ibm_chip_id()
1002 	return -1;  in of_get_ibm_chip_id()
1007  * cpu_to_chip_id - Return the cpus chip-id
1010  * Return the value of the ibm,chip-id property corresponding to the given
1011  * logical cpu number. If the chip-id can not be found, returns -1.
1016 	int ret = -1, idx;  in cpu_to_chip_id()
1019 	if (chip_id_lookup_table && chip_id_lookup_table[idx] != -1)  in cpu_to_chip_id()