diff options
Diffstat (limited to 'arch/powerpc/mm/drmem.c')
| -rw-r--r-- | arch/powerpc/mm/drmem.c | 192 |
1 files changed, 188 insertions, 4 deletions
diff --git a/arch/powerpc/mm/drmem.c b/arch/powerpc/mm/drmem.c index 61bc183013ae..1604110c4238 100644 --- a/arch/powerpc/mm/drmem.c +++ b/arch/powerpc/mm/drmem.c @@ -92,6 +92,84 @@ static int drmem_update_dt_v1(struct device_node *memory, return 0; } +static void init_drconf_v2_cell(struct of_drconf_cell_v2 *dr_cell, + struct drmem_lmb *lmb) +{ + dr_cell->base_addr = cpu_to_be64(lmb->base_addr); + dr_cell->drc_index = cpu_to_be32(lmb->drc_index); + dr_cell->aa_index = cpu_to_be32(lmb->aa_index); + dr_cell->flags = cpu_to_be32(lmb->flags); +} + +static int drmem_update_dt_v2(struct device_node *memory, + struct property *prop) +{ + struct property *new_prop; + struct of_drconf_cell_v2 *dr_cell; + struct drmem_lmb *lmb, *prev_lmb; + u32 lmb_sets, prop_sz, seq_lmbs; + u32 *p; + + /* First pass, determine how many LMB sets are needed. */ + lmb_sets = 0; + prev_lmb = NULL; + for_each_drmem_lmb(lmb) { + if (!prev_lmb) { + prev_lmb = lmb; + lmb_sets++; + continue; + } + + if (prev_lmb->aa_index != lmb->aa_index || + prev_lmb->flags != lmb->flags) + lmb_sets++; + + prev_lmb = lmb; + } + + prop_sz = lmb_sets * sizeof(*dr_cell) + sizeof(__be32); + new_prop = clone_property(prop, prop_sz); + if (!new_prop) + return -1; + + p = new_prop->value; + *p++ = cpu_to_be32(lmb_sets); + + dr_cell = (struct of_drconf_cell_v2 *)p; + + /* Second pass, populate the LMB set data */ + prev_lmb = NULL; + seq_lmbs = 0; + for_each_drmem_lmb(lmb) { + if (prev_lmb == NULL) { + /* Start of first LMB set */ + prev_lmb = lmb; + init_drconf_v2_cell(dr_cell, lmb); + seq_lmbs++; + continue; + } + + if (prev_lmb->aa_index != lmb->aa_index || + prev_lmb->flags != lmb->flags) { + /* end of one set, start of another */ + dr_cell->seq_lmbs = cpu_to_be32(seq_lmbs); + dr_cell++; + + init_drconf_v2_cell(dr_cell, lmb); + seq_lmbs = 1; + } else { + seq_lmbs++; + } + + prev_lmb = lmb; + } + + /* close out last LMB set */ + dr_cell->seq_lmbs = cpu_to_be32(seq_lmbs); + of_update_property(memory, new_prop); + return 0; +} + int drmem_update_dt(void) { struct device_node *memory; @@ -103,8 +181,13 @@ int drmem_update_dt(void) return -1; prop = of_find_property(memory, "ibm,dynamic-memory", NULL); - if (prop) + if (prop) { rc = drmem_update_dt_v1(memory, prop); + } else { + prop = of_find_property(memory, "ibm,dynamic-memory-v2", NULL); + if (prop) + rc = drmem_update_dt_v2(memory, prop); + } of_node_put(memory); return rc; @@ -140,6 +223,47 @@ static void __init __walk_drmem_v1_lmbs(const __be32 *prop, const __be32 *usm, } } +static void __init read_drconf_v2_cell(struct of_drconf_cell_v2 *dr_cell, + const __be32 **prop) +{ + const __be32 *p = *prop; + + dr_cell->seq_lmbs = of_read_number(p++, 1); + dr_cell->base_addr = dt_mem_next_cell(dt_root_addr_cells, &p); + dr_cell->drc_index = of_read_number(p++, 1); + dr_cell->aa_index = of_read_number(p++, 1); + dr_cell->flags = of_read_number(p++, 1); + + *prop = p; +} + +static void __init __walk_drmem_v2_lmbs(const __be32 *prop, const __be32 *usm, + void (*func)(struct drmem_lmb *, const __be32 **)) +{ + struct of_drconf_cell_v2 dr_cell; + struct drmem_lmb lmb; + u32 i, j, lmb_sets; + + lmb_sets = of_read_number(prop++, 1); + + for (i = 0; i < lmb_sets; i++) { + read_drconf_v2_cell(&dr_cell, &prop); + + for (j = 0; j < dr_cell.seq_lmbs; j++) { + lmb.base_addr = dr_cell.base_addr; + dr_cell.base_addr += drmem_lmb_size(); + + lmb.drc_index = dr_cell.drc_index; + dr_cell.drc_index++; + + lmb.aa_index = dr_cell.aa_index; + lmb.flags = dr_cell.flags; + + func(&lmb, &usm); + } + } +} + #ifdef CONFIG_PPC_PSERIES void __init walk_drmem_lmbs_early(unsigned long node, void (*func)(struct drmem_lmb *, const __be32 **)) @@ -156,8 +280,14 @@ void __init walk_drmem_lmbs_early(unsigned long node, usm = of_get_flat_dt_prop(node, "linux,drconf-usable-memory", &len); prop = of_get_flat_dt_prop(node, "ibm,dynamic-memory", &len); - if (prop) + if (prop) { __walk_drmem_v1_lmbs(prop, usm, func); + } else { + prop = of_get_flat_dt_prop(node, "ibm,dynamic-memory-v2", + &len); + if (prop) + __walk_drmem_v2_lmbs(prop, usm, func); + } memblock_dump_all(); } @@ -210,8 +340,13 @@ void __init walk_drmem_lmbs(struct device_node *dn, usm = of_get_usable_memory(dn); prop = of_get_property(dn, "ibm,dynamic-memory", NULL); - if (prop) + if (prop) { __walk_drmem_v1_lmbs(prop, usm, func); + } else { + prop = of_get_property(dn, "ibm,dynamic-memory-v2", NULL); + if (prop) + __walk_drmem_v2_lmbs(prop, usm, func); + } } static void __init init_drmem_v1_lmbs(const __be32 *prop) @@ -229,6 +364,50 @@ static void __init init_drmem_v1_lmbs(const __be32 *prop) read_drconf_v1_cell(lmb, &prop); } +static void __init init_drmem_v2_lmbs(const __be32 *prop) +{ + struct drmem_lmb *lmb; + struct of_drconf_cell_v2 dr_cell; + const __be32 *p; + u32 i, j, lmb_sets; + int lmb_index; + + lmb_sets = of_read_number(prop++, 1); + + /* first pass, calculate the number of LMBs */ + p = prop; + for (i = 0; i < lmb_sets; i++) { + read_drconf_v2_cell(&dr_cell, &p); + drmem_info->n_lmbs += dr_cell.seq_lmbs; + } + + drmem_info->lmbs = kcalloc(drmem_info->n_lmbs, sizeof(*lmb), + GFP_KERNEL); + if (!drmem_info->lmbs) + return; + + /* second pass, read in the LMB information */ + lmb_index = 0; + p = prop; + + for (i = 0; i < lmb_sets; i++) { + read_drconf_v2_cell(&dr_cell, &p); + + for (j = 0; j < dr_cell.seq_lmbs; j++) { + lmb = &drmem_info->lmbs[lmb_index++]; + + lmb->base_addr = dr_cell.base_addr; + dr_cell.base_addr += drmem_info->lmb_size; + + lmb->drc_index = dr_cell.drc_index; + dr_cell.drc_index++; + + lmb->aa_index = dr_cell.aa_index; + lmb->flags = dr_cell.flags; + } + } +} + static int __init drmem_init(void) { struct device_node *dn; @@ -246,8 +425,13 @@ static int __init drmem_init(void) } prop = of_get_property(dn, "ibm,dynamic-memory", NULL); - if (prop) + if (prop) { init_drmem_v1_lmbs(prop); + } else { + prop = of_get_property(dn, "ibm,dynamic-memory-v2", NULL); + if (prop) + init_drmem_v2_lmbs(prop); + } of_node_put(dn); return 0; |