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Date: Thu, 18 Dec 2014 13:18:00 +0300
From: Aleksey Makarov <aleksey.makarov@...iga.com>
To: <linux-mips@...ux-mips.org>
CC: <linux-kernel@...r.kernel.org>,
David Daney <david.daney@...ium.com>,
Aleksey Makarov <aleksey.makarov@...iga.com>,
Leonid Rosenboim <lrosenboim@...iumnetworks.com>,
Ralf Baechle <ralf@...ux-mips.org>
Subject: [PATCH v2 08/12] MIPS: OCTEON: Add ability to used an initrd from a named memory block.
From: David Daney <david.daney@...ium.com>
If 'rd_name=xxx' is passed to the kernel, the named block with name
'xxx' is used for the initrd.
Signed-off-by: David Daney <david.daney@...ium.com>
Signed-off-by: Leonid Rosenboim <lrosenboim@...iumnetworks.com>
[aleksey.makarov@...iga.com: conflict resolution]
Signed-off-by: Aleksey Makarov <aleksey.makarov@...iga.com>
---
arch/mips/cavium-octeon/setup.c | 37 +++++++++++++++++++++++++++++++++----
arch/mips/include/asm/bootinfo.h | 1 +
arch/mips/kernel/setup.c | 19 ++++++++++++++++---
3 files changed, 50 insertions(+), 7 deletions(-)
diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c
index 627f9e8..8bba56f 100644
--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -28,6 +28,7 @@
#include <linux/of_fdt.h>
#include <linux/libfdt.h>
#include <linux/kexec.h>
+#include <linux/initrd.h>
#include <asm/processor.h>
#include <asm/reboot.h>
@@ -264,6 +265,9 @@ static int octeon_uart;
extern asmlinkage void handle_int(void);
+/* If an initrd named block is specified, its name goes here. */
+static char rd_name[64] __initdata;
+
/**
* Return non zero if we are currently running in the Octeon simulator
*
@@ -812,6 +816,10 @@ void __init prom_init(void)
MAX_MEMORY = 32ull << 30;
if (*p == '@')
RESERVE_LOW_MEM = memparse(p + 1, &p);
+ } else if (strncmp(arg, "rd_name=", 8) == 0) {
+ strncpy(rd_name, arg + 8, sizeof(rd_name));
+ rd_name[sizeof(rd_name) - 1] = 0;
+ goto append_arg;
#ifdef CONFIG_KEXEC
} else if (strncmp(arg, "crashkernel=", 12) == 0) {
crashk_size = memparse(arg+12, &p);
@@ -824,11 +832,15 @@ void __init prom_init(void)
* parse_crashkernel(arg, sysinfo->system_dram_size,
* &crashk_size, &crashk_base);
*/
+ goto append_arg;
#endif
- } else if (strlen(arcs_cmdline) + strlen(arg) + 1 <
- sizeof(arcs_cmdline) - 1) {
- strcat(arcs_cmdline, " ");
- strcat(arcs_cmdline, arg);
+ } else {
+append_arg:
+ if (strlen(arcs_cmdline) + strlen(arg) + 1
+ < sizeof(arcs_cmdline) - 1) {
+ strcat(arcs_cmdline, " ");
+ strcat(arcs_cmdline, arg);
+ }
}
}
@@ -892,6 +904,23 @@ void __init plat_mem_setup(void)
total = 0;
crashk_end = 0;
+#ifdef CONFIG_BLK_DEV_INITRD
+
+ if (rd_name[0]) {
+ const struct cvmx_bootmem_named_block_desc *initrd_block;
+
+ initrd_block = cvmx_bootmem_find_named_block(rd_name);
+ if (initrd_block != NULL) {
+ initrd_start = initrd_block->base_addr + PAGE_OFFSET;
+ initrd_end = initrd_start + initrd_block->size;
+ add_memory_region(initrd_block->base_addr,
+ initrd_block->size, BOOT_MEM_INIT_RAM);
+ initrd_in_reserved = 1;
+ total += initrd_block->size;
+ }
+ }
+#endif
+
/*
* The Mips memory init uses the first memory location for
* some memory vectors. When SPARSEMEM is in use, it doesn't
diff --git a/arch/mips/include/asm/bootinfo.h b/arch/mips/include/asm/bootinfo.h
index 1f7ca8b..0720562 100644
--- a/arch/mips/include/asm/bootinfo.h
+++ b/arch/mips/include/asm/bootinfo.h
@@ -108,6 +108,7 @@ struct boot_mem_map {
};
extern struct boot_mem_map boot_mem_map;
+extern bool initrd_in_reserved;
extern void add_memory_region(phys_t start, phys_t size, long type);
extern void detect_memory_region(phys_t start, phys_t sz_min, phys_t sz_max);
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index f3b635f..b9adfc06 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -62,6 +62,7 @@ unsigned long mips_machtype __read_mostly = MACH_UNKNOWN;
EXPORT_SYMBOL(mips_machtype);
struct boot_mem_map boot_mem_map;
+bool initrd_in_reserved;
static char __initdata command_line[COMMAND_LINE_SIZE];
char __initdata arcs_cmdline[COMMAND_LINE_SIZE];
@@ -307,8 +308,14 @@ static void __init bootmem_init(void)
* as our memory range starting point. Once bootmem is inited we
* will reserve the area used for the initrd.
*/
- init_initrd();
- reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end));
+
+ if (initrd_in_reserved) {
+ init_initrd();
+ reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end));
+ } else {
+ reserved_end = max_t(unsigned long, init_initrd(),
+ PFN_UP(__pa_symbol(&_end)));
+ }
/*
* max_low_pfn is not a number of pages. The number of pages
@@ -323,8 +330,14 @@ static void __init bootmem_init(void)
for (i = 0; i < boot_mem_map.nr_map; i++) {
unsigned long start, end;
- if (boot_mem_map.map[i].type != BOOT_MEM_RAM)
+ switch (boot_mem_map.map[i].type) {
+ case BOOT_MEM_RAM:
+ case BOOT_MEM_INIT_RAM:
+ break;
+ default:
+ /* Not usable memory */
continue;
+ }
start = PFN_UP(boot_mem_map.map[i].addr);
end = PFN_DOWN(boot_mem_map.map[i].addr
--
2.1.3
--
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