diff options
Diffstat (limited to 'arch/tile/kernel')
| -rw-r--r-- | arch/tile/kernel/setup.c | 80 |
1 files changed, 76 insertions, 4 deletions
diff --git a/arch/tile/kernel/setup.c b/arch/tile/kernel/setup.c index 676e155..b00e156 100644 --- a/arch/tile/kernel/setup.c +++ b/arch/tile/kernel/setup.c @@ -154,6 +154,65 @@ static int __init setup_maxnodemem(char *str) } early_param("maxnodemem", setup_maxnodemem); +struct memmap_entry { + u64 addr; /* start of memory segment */ + u64 size; /* size of memory segment */ +}; +static struct memmap_entry memmap_map[64]; +static int memmap_nr; + +static void add_memmap_region(u64 addr, u64 size) +{ + if (memmap_nr >= ARRAY_SIZE(memmap_map)) { + pr_err("Ooops! Too many entries in the memory map!\n"); + return; + } + memmap_map[memmap_nr].addr = addr; + memmap_map[memmap_nr].size = size; + memmap_nr++; +} + +static int __init setup_memmap(char *p) +{ + char *oldp; + u64 start_at, mem_size; + + if (!p) + return -EINVAL; + + if (!strncmp(p, "exactmap", 8)) { + pr_err("\"memmap=exactmap\" not valid on tile\n"); + return 0; + } + + oldp = p; + mem_size = memparse(p, &p); + if (p == oldp) + return -EINVAL; + + if (*p == '@') { + pr_err("\"memmap=nn@ss\" (force RAM) invalid on tile\n"); + } else if (*p == '#') { + pr_err("\"memmap=nn#ss\" (force ACPI data) invalid on tile\n"); + } else if (*p == '$') { + start_at = memparse(p+1, &p); + add_memmap_region(start_at, mem_size); + } else { + if (mem_size == 0) + return -EINVAL; + maxmem_pfn = (mem_size >> HPAGE_SHIFT) << + (HPAGE_SHIFT - PAGE_SHIFT); + } + return *p == '\0' ? 0 : -EINVAL; +} +early_param("memmap", setup_memmap); + +static int __init setup_mem(char *str) +{ + return setup_maxmem(str); +} +early_param("mem", setup_mem); /* compatibility with x86 */ + static int __init setup_isolnodes(char *str) { char buf[MAX_NUMNODES * 5]; @@ -629,6 +688,12 @@ static void __init setup_bootmem_allocator(void) for (i = 0; i < MAX_NUMNODES; ++i) setup_bootmem_allocator_node(i); + /* Reserve any memory excluded by "memmap" arguments. */ + for (i = 0; i < memmap_nr; ++i) { + struct memmap_entry *m = &memmap_map[i]; + reserve_bootmem(m->addr, m->size, 0); + } + #ifdef CONFIG_KEXEC if (crashk_res.start != crashk_res.end) reserve_bootmem(crashk_res.start, resource_size(&crashk_res), 0); @@ -1562,11 +1627,11 @@ insert_non_bus_resource(void) #endif static struct resource* __init -insert_ram_resource(u64 start_pfn, u64 end_pfn) +insert_ram_resource(u64 start_pfn, u64 end_pfn, bool reserved) { struct resource *res = kzalloc(sizeof(struct resource), GFP_ATOMIC); - res->name = "System RAM"; + res->name = reserved ? "Reserved" : "System RAM"; res->start = start_pfn << PAGE_SHIFT; res->end = (end_pfn << PAGE_SHIFT) - 1; res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; @@ -1601,11 +1666,11 @@ static int __init request_standard_resources(void) end_pfn > pci_reserve_start_pfn) { if (end_pfn > pci_reserve_end_pfn) insert_ram_resource(pci_reserve_end_pfn, - end_pfn); + end_pfn, 0); end_pfn = pci_reserve_start_pfn; } #endif - insert_ram_resource(start_pfn, end_pfn); + insert_ram_resource(start_pfn, end_pfn, 0); } code_resource.start = __pa(_text - CODE_DELTA); @@ -1616,6 +1681,13 @@ static int __init request_standard_resources(void) insert_resource(&iomem_resource, &code_resource); insert_resource(&iomem_resource, &data_resource); + /* Mark any "memmap" regions busy for the resource manager. */ + for (i = 0; i < memmap_nr; ++i) { + struct memmap_entry *m = &memmap_map[i]; + insert_ram_resource(PFN_DOWN(m->addr), + PFN_UP(m->addr + m->size - 1), 1); + } + #ifdef CONFIG_KEXEC insert_resource(&iomem_resource, &crashk_res); #endif |