From: David Daney <david.daney@xxxxxxxxxx>
Command line syntax is:
mem=block:block_name1,block_name2,...
A maximum of 4 blocks are currently supported
Signed-off-by: David Daney <david.daney@xxxxxxxxxx>
Signed-off-by: Carlos Munoz <carlos.munoz@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Corey Minyard <cminyard@xxxxxxxxxx>
---
arch/mips/cavium-octeon/setup.c | 66 ++++++++++++++++++++++++++++++++++++-----
1 file changed, 59 insertions(+), 7 deletions(-)
diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c
index 46e2bb0..2855d8d 100644
--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -198,6 +198,9 @@ static int octeon_uart;
extern asmlinkage void handle_int(void);
+/* Up to four blocks may be specified. */
+static char __initdata named_memory_blocks[4][CVMX_BOOTMEM_NAME_LEN];
+
/**
* Return non zero if we are currently running in the Octeon simulator
*
@@ -774,7 +777,26 @@ void __init prom_init(void)
for (i = 0; i < argc; i++) {
const char *arg =
cvmx_phys_to_ptr(octeon_boot_desc_ptr->argv[i]);
- if ((strncmp(arg, "MEM=", 4) == 0) ||
+ if (strncmp(arg, "mem=block:", 10) == 0) {
+ const char *pos = arg + 10;
+ int j;
+
+ for (j = 0; pos[0] && j < ARRAY_SIZE(named_memory_blocks); j++) {
+ int len;
+ char *comma = strchr(pos, ',');
+ if (comma)
+ len = comma - pos;
+ else
+ len = max(strlen(pos), ARRAY_SIZE(named_memory_blocks[0]));
+ strncpy(named_memory_blocks[j], pos, len);
+ if (comma)
+ pos = comma + 1;
+ else
+ break;
+ }
+ for (j = 0; j < ARRAY_SIZE(named_memory_blocks); j++)
+ pr_err("Named Block[%d] = \"%s\"\n", j, named_memory_blocks[j]);
+ } else if ((strncmp(arg, "MEM=", 4) == 0) ||
(strncmp(arg, "mem=", 4) == 0)) {
max_memory = memparse(arg + 4, &p);
if (max_memory == 0)
@@ -875,10 +897,35 @@ void __init plat_mem_setup(void)
uint64_t total;
uint64_t crashk_end;
int64_t memory;
+ const struct cvmx_bootmem_named_block_desc *named_block;
total = 0;
crashk_end = 0;
+ if (named_memory_blocks[0][0]) {
+ /* Memory from named blocks only */
+ int i;
+
+ for (i = 0;
+ named_memory_blocks[i][0] && i < ARRAY_SIZE(named_memory_blocks);
+ i++) {
+ named_block = cvmx_bootmem_find_named_block(named_memory_blocks[i]);
+ if (!named_block) {
+ pr_err("Error: Couldn't find cvmx_bootmem block \"%s\"",
+ named_memory_blocks[i]);
+ return;
+ }
+ pr_info("Adding memory from \"%s\": %016lx @ %016lx\n",
+ named_memory_blocks[i],
+ (unsigned long)named_block->size,
+ (unsigned long)named_block->base_addr);
+ add_memory_region(named_block->base_addr, named_block->size,
+ BOOT_MEM_RAM);
+ total += named_block->size;
+ }
+ goto mem_alloc_done;
+ }
+
/*
* The Mips memory init uses the first memory location for
* some memory vectors. When SPARSEMEM is in use, it doesn't
@@ -901,18 +948,23 @@ void __init plat_mem_setup(void)
crashk_end = crashk_base + crashk_size;
}
#endif
- /*
- * When allocating memory, we want incrementing addresses from
- * bootmem_alloc so the code in add_memory_region can merge
- * regions next to each other.
- */
cvmx_bootmem_lock();
while ((boot_mem_map.nr_map < BOOT_MEM_MAP_MAX)
&& (total < max_memory)) {
+#if defined(CONFIG_64BIT) || defined(CONFIG_64BIT_PHYS_ADDR)
memory = cvmx_bootmem_phy_alloc(mem_alloc_size,
__pa_symbol(&_end), -1,
0x100000,
CVMX_BOOTMEM_FLAG_NO_LOCKING);
+#elif defined(CONFIG_HIGHMEM)
+ memory = cvmx_bootmem_phy_alloc(mem_alloc_size, 0, 1ull << 31,
+ 0x100000,
+ CVMX_BOOTMEM_FLAG_NO_LOCKING);
+#else
+ memory = cvmx_bootmem_phy_alloc(mem_alloc_size, 0, 512 << 20,
+ 0x100000,
+ CVMX_BOOTMEM_FLAG_NO_LOCKING);
+#endif
if (memory >= 0) {
u64 size = mem_alloc_size;
@@ -942,7 +994,7 @@ void __init plat_mem_setup(void)
}
cvmx_bootmem_unlock();
#endif /* CONFIG_CRASH_DUMP */
-
+mem_alloc_done:
#ifdef CONFIG_CAVIUM_RESERVE32
/*
* Now that we've allocated the kernel memory it is safe to
--
2.1.4
