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author | Ralf Baechle <ralf@linux-mips.org> | 2006-06-18 01:32:22 +0100 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2006-06-19 17:39:23 +0100 |
commit | 2925aba4223f4532e85f0c6f64584b3e0b2849c3 (patch) | |
tree | 1a7d38a22db3b745926232d665d6653baa47ee61 /arch/mips/kernel/setup.c | |
parent | 7ab2dc41d15f31e9d5472e46148337b4cf7c941c (diff) | |
download | lwn-2925aba4223f4532e85f0c6f64584b3e0b2849c3.tar.gz lwn-2925aba4223f4532e85f0c6f64584b3e0b2849c3.zip |
[MIPS] Cleanup memory managment initialization.
Historically plat_mem_setup did the entire platform initialization. This
was rather impractical because it meant plat_mem_setup had to get away
without any kind of memory allocator. To keep old code from breaking
plat_setup was just renamed to plat_setup and a second platform
initialization hook for anything else was introduced.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/setup.c')
-rw-r--r-- | arch/mips/kernel/setup.c | 56 |
1 files changed, 43 insertions, 13 deletions
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c index 397a70e651b5..bfcec8d9bfe4 100644 --- a/arch/mips/kernel/setup.c +++ b/arch/mips/kernel/setup.c @@ -442,6 +442,48 @@ static inline void bootmem_init(void) #endif /* CONFIG_BLK_DEV_INITRD */ } +/* + * arch_mem_init - initialize memory managment subsystem + * + * o plat_mem_setup() detects the memory configuration and will record detected + * memory areas using add_memory_region. + * o parse_cmdline_early() parses the command line for mem= options which, + * iff detected, will override the results of the automatic detection. + * + * At this stage the memory configuration of the system is known to the + * kernel but generic memory managment system is still entirely uninitialized. + * + * o bootmem_init() + * o sparse_init() + * o paging_init() + * + * At this stage the bootmem allocator is ready to use. + * + * NOTE: historically plat_mem_setup did the entire platform initialization. + * This was rather impractical because it meant plat_mem_setup had to + * get away without any kind of memory allocator. To keep old code from + * breaking plat_setup was just renamed to plat_setup and a second platform + * initialization hook for anything else was introduced. + */ + +extern void plat_mem_setup(void); + +static void __init arch_mem_init(char **cmdline_p) +{ + /* call board setup routine */ + plat_mem_setup(); + + strlcpy(command_line, arcs_cmdline, sizeof(command_line)); + strlcpy(saved_command_line, command_line, COMMAND_LINE_SIZE); + + *cmdline_p = command_line; + + parse_cmdline_early(); + bootmem_init(); + sparse_init(); + paging_init(); +} + static inline void resource_init(void) { int i; @@ -495,8 +537,6 @@ static inline void resource_init(void) #undef MAXMEM #undef MAXMEM_PFN -extern void plat_setup(void); - void __init setup_arch(char **cmdline_p) { cpu_probe(); @@ -511,18 +551,8 @@ void __init setup_arch(char **cmdline_p) #endif #endif - /* call board setup routine */ - plat_setup(); + arch_mem_init(cmdline_p); - strlcpy(command_line, arcs_cmdline, sizeof(command_line)); - strlcpy(saved_command_line, command_line, COMMAND_LINE_SIZE); - - *cmdline_p = command_line; - - parse_cmdline_early(); - bootmem_init(); - sparse_init(); - paging_init(); resource_init(); #ifdef CONFIG_SMP plat_smp_setup(); |