^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Dynamic reconfiguration memory support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2017 IBM Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #define pr_fmt(fmt) "drmem: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/of_fdt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/prom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/drmem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static int n_root_addr_cells, n_root_size_cells;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static struct drmem_lmb_info __drmem_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct drmem_lmb_info *drmem_info = &__drmem_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) u64 drmem_lmb_memory_max(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct drmem_lmb *last_lmb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) last_lmb = &drmem_info->lmbs[drmem_info->n_lmbs - 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) return last_lmb->base_addr + drmem_lmb_size();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static u32 drmem_lmb_flags(struct drmem_lmb *lmb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * Return the value of the lmb flags field minus the reserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * bit used internally for hotplug processing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) return lmb->flags & ~DRMEM_LMB_RESERVED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static struct property *clone_property(struct property *prop, u32 prop_sz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct property *new_prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) new_prop = kzalloc(sizeof(*new_prop), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (!new_prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) new_prop->name = kstrdup(prop->name, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) new_prop->value = kzalloc(prop_sz, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (!new_prop->name || !new_prop->value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) kfree(new_prop->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) kfree(new_prop->value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) kfree(new_prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) new_prop->length = prop_sz;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #if defined(CONFIG_OF_DYNAMIC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) of_property_set_flag(new_prop, OF_DYNAMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return new_prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static int drmem_update_dt_v1(struct device_node *memory,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct property *prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct property *new_prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct of_drconf_cell_v1 *dr_cell;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct drmem_lmb *lmb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) u32 *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) new_prop = clone_property(prop, prop->length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (!new_prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) p = new_prop->value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) *p++ = cpu_to_be32(drmem_info->n_lmbs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) dr_cell = (struct of_drconf_cell_v1 *)p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) for_each_drmem_lmb(lmb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) dr_cell->base_addr = cpu_to_be64(lmb->base_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) dr_cell->drc_index = cpu_to_be32(lmb->drc_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) dr_cell->aa_index = cpu_to_be32(lmb->aa_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) dr_cell->flags = cpu_to_be32(drmem_lmb_flags(lmb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) dr_cell++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) of_update_property(memory, new_prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static void init_drconf_v2_cell(struct of_drconf_cell_v2 *dr_cell,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) struct drmem_lmb *lmb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) dr_cell->base_addr = cpu_to_be64(lmb->base_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) dr_cell->drc_index = cpu_to_be32(lmb->drc_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) dr_cell->aa_index = cpu_to_be32(lmb->aa_index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) dr_cell->flags = cpu_to_be32(drmem_lmb_flags(lmb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static int drmem_update_dt_v2(struct device_node *memory,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) struct property *prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct property *new_prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct of_drconf_cell_v2 *dr_cell;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) struct drmem_lmb *lmb, *prev_lmb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) u32 lmb_sets, prop_sz, seq_lmbs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) u32 *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) /* First pass, determine how many LMB sets are needed. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) lmb_sets = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) prev_lmb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) for_each_drmem_lmb(lmb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (!prev_lmb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) prev_lmb = lmb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) lmb_sets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (prev_lmb->aa_index != lmb->aa_index ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) drmem_lmb_flags(prev_lmb) != drmem_lmb_flags(lmb))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) lmb_sets++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) prev_lmb = lmb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) prop_sz = lmb_sets * sizeof(*dr_cell) + sizeof(__be32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) new_prop = clone_property(prop, prop_sz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (!new_prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) p = new_prop->value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) *p++ = cpu_to_be32(lmb_sets);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) dr_cell = (struct of_drconf_cell_v2 *)p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /* Second pass, populate the LMB set data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) prev_lmb = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) seq_lmbs = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) for_each_drmem_lmb(lmb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (prev_lmb == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) /* Start of first LMB set */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) prev_lmb = lmb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) init_drconf_v2_cell(dr_cell, lmb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) seq_lmbs++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (prev_lmb->aa_index != lmb->aa_index ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) drmem_lmb_flags(prev_lmb) != drmem_lmb_flags(lmb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) /* end of one set, start of another */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) dr_cell->seq_lmbs = cpu_to_be32(seq_lmbs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) dr_cell++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) init_drconf_v2_cell(dr_cell, lmb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) seq_lmbs = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) seq_lmbs++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) prev_lmb = lmb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /* close out last LMB set */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) dr_cell->seq_lmbs = cpu_to_be32(seq_lmbs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) of_update_property(memory, new_prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) int drmem_update_dt(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) struct device_node *memory;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) struct property *prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) int rc = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) memory = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (!memory)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) prop = of_find_property(memory, "ibm,dynamic-memory", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if (prop) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) rc = drmem_update_dt_v1(memory, prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) prop = of_find_property(memory, "ibm,dynamic-memory-v2", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) rc = drmem_update_dt_v2(memory, prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) of_node_put(memory);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static void read_drconf_v1_cell(struct drmem_lmb *lmb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) const __be32 **prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) const __be32 *p = *prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) lmb->base_addr = of_read_number(p, n_root_addr_cells);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) p += n_root_addr_cells;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) lmb->drc_index = of_read_number(p++, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) p++; /* skip reserved field */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) lmb->aa_index = of_read_number(p++, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) lmb->flags = of_read_number(p++, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) *prop = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) __walk_drmem_v1_lmbs(const __be32 *prop, const __be32 *usm, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) int (*func)(struct drmem_lmb *, const __be32 **, void *))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) struct drmem_lmb lmb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) u32 i, n_lmbs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) n_lmbs = of_read_number(prop++, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) for (i = 0; i < n_lmbs; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) read_drconf_v1_cell(&lmb, &prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) ret = func(&lmb, &usm, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) static void read_drconf_v2_cell(struct of_drconf_cell_v2 *dr_cell,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) const __be32 **prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) const __be32 *p = *prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) dr_cell->seq_lmbs = of_read_number(p++, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) dr_cell->base_addr = of_read_number(p, n_root_addr_cells);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) p += n_root_addr_cells;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) dr_cell->drc_index = of_read_number(p++, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) dr_cell->aa_index = of_read_number(p++, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) dr_cell->flags = of_read_number(p++, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) *prop = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) __walk_drmem_v2_lmbs(const __be32 *prop, const __be32 *usm, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) int (*func)(struct drmem_lmb *, const __be32 **, void *))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) struct of_drconf_cell_v2 dr_cell;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) struct drmem_lmb lmb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) u32 i, j, lmb_sets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) lmb_sets = of_read_number(prop++, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) for (i = 0; i < lmb_sets; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) read_drconf_v2_cell(&dr_cell, &prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) for (j = 0; j < dr_cell.seq_lmbs; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) lmb.base_addr = dr_cell.base_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) dr_cell.base_addr += drmem_lmb_size();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) lmb.drc_index = dr_cell.drc_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) dr_cell.drc_index++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) lmb.aa_index = dr_cell.aa_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) lmb.flags = dr_cell.flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) ret = func(&lmb, &usm, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) #ifdef CONFIG_PPC_PSERIES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) int __init walk_drmem_lmbs_early(unsigned long node, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) int (*func)(struct drmem_lmb *, const __be32 **, void *))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) const __be32 *prop, *usm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) int len, ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) prop = of_get_flat_dt_prop(node, "ibm,lmb-size", &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) if (!prop || len < dt_root_size_cells * sizeof(__be32))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) /* Get the address & size cells */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) n_root_addr_cells = dt_root_addr_cells;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) n_root_size_cells = dt_root_size_cells;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) drmem_info->lmb_size = dt_mem_next_cell(dt_root_size_cells, &prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) usm = of_get_flat_dt_prop(node, "linux,drconf-usable-memory", &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) prop = of_get_flat_dt_prop(node, "ibm,dynamic-memory", &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (prop) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) ret = __walk_drmem_v1_lmbs(prop, usm, data, func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) prop = of_get_flat_dt_prop(node, "ibm,dynamic-memory-v2",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) ret = __walk_drmem_v2_lmbs(prop, usm, data, func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) memblock_dump_all();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) static int init_drmem_lmb_size(struct device_node *dn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) const __be32 *prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (drmem_info->lmb_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) prop = of_get_property(dn, "ibm,lmb-size", &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (!prop || len < n_root_size_cells * sizeof(__be32)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) pr_info("Could not determine LMB size\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) drmem_info->lmb_size = of_read_number(prop, n_root_size_cells);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) * Returns the property linux,drconf-usable-memory if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) * it exists (the property exists only in kexec/kdump kernels,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) * added by kexec-tools)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) static const __be32 *of_get_usable_memory(struct device_node *dn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) const __be32 *prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) u32 len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) prop = of_get_property(dn, "linux,drconf-usable-memory", &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (!prop || len < sizeof(unsigned int))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) return prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) int walk_drmem_lmbs(struct device_node *dn, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) int (*func)(struct drmem_lmb *, const __be32 **, void *))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) const __be32 *prop, *usm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) int ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) if (!of_root)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) /* Get the address & size cells */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) of_node_get(of_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) n_root_addr_cells = of_n_addr_cells(of_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) n_root_size_cells = of_n_size_cells(of_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) of_node_put(of_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) if (init_drmem_lmb_size(dn))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) usm = of_get_usable_memory(dn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) prop = of_get_property(dn, "ibm,dynamic-memory", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (prop) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) ret = __walk_drmem_v1_lmbs(prop, usm, data, func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) prop = of_get_property(dn, "ibm,dynamic-memory-v2", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) if (prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) ret = __walk_drmem_v2_lmbs(prop, usm, data, func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) static void __init init_drmem_v1_lmbs(const __be32 *prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) struct drmem_lmb *lmb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) drmem_info->n_lmbs = of_read_number(prop++, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (drmem_info->n_lmbs == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) drmem_info->lmbs = kcalloc(drmem_info->n_lmbs, sizeof(*lmb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) if (!drmem_info->lmbs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) for_each_drmem_lmb(lmb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) read_drconf_v1_cell(lmb, &prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) static void __init init_drmem_v2_lmbs(const __be32 *prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) struct drmem_lmb *lmb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) struct of_drconf_cell_v2 dr_cell;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) const __be32 *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) u32 i, j, lmb_sets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) int lmb_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) lmb_sets = of_read_number(prop++, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) if (lmb_sets == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) /* first pass, calculate the number of LMBs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) p = prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) for (i = 0; i < lmb_sets; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) read_drconf_v2_cell(&dr_cell, &p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) drmem_info->n_lmbs += dr_cell.seq_lmbs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) drmem_info->lmbs = kcalloc(drmem_info->n_lmbs, sizeof(*lmb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (!drmem_info->lmbs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) /* second pass, read in the LMB information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) lmb_index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) p = prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) for (i = 0; i < lmb_sets; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) read_drconf_v2_cell(&dr_cell, &p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) for (j = 0; j < dr_cell.seq_lmbs; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) lmb = &drmem_info->lmbs[lmb_index++];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) lmb->base_addr = dr_cell.base_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) dr_cell.base_addr += drmem_info->lmb_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) lmb->drc_index = dr_cell.drc_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) dr_cell.drc_index++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) lmb->aa_index = dr_cell.aa_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) lmb->flags = dr_cell.flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) static int __init drmem_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) struct device_node *dn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) const __be32 *prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) dn = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (!dn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) pr_info("No dynamic reconfiguration memory found\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) if (init_drmem_lmb_size(dn)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) of_node_put(dn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) prop = of_get_property(dn, "ibm,dynamic-memory", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (prop) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) init_drmem_v1_lmbs(prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) prop = of_get_property(dn, "ibm,dynamic-memory-v2", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) if (prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) init_drmem_v2_lmbs(prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) of_node_put(dn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) late_initcall(drmem_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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