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powerpc: make mem= work on iSeries again 

By parsing the command line earlier, we can add the mem= value to the
flattened device tree and let the generic code sort out the memory limit
for us.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
This commit is contained in:
Stephen Rothwell 2005-11-01 11:45:19 +11:00
parent 5015b49448
commit bec7c458b3
2 changed files with 25 additions and 34 deletions
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17
arch/powerpc/kernel/setup_64.c
View File

@ -631,23 +631,6 @@ static int ppc64_panic_event(struct notifier_block *this,
return NOTIFY_DONE;
}
#ifdef CONFIG_PPC_ISERIES
/*
* On iSeries we just parse the mem=X option from the command line.
* On pSeries it's a bit more complicated, see prom_init_mem()
*/
static int __init early_parsemem(char *p)
{
if (!p)
return 0;
memory_limit = ALIGN(memparse(p, &p), PAGE_SIZE);
return 0;
}
early_param("mem", early_parsemem);
#endif /* CONFIG_PPC_ISERIES */
#ifdef CONFIG_IRQSTACKS
static void __init irqstack_early_init(void)
{

42
arch/powerpc/platforms/iseries/setup.c
View File

@ -27,6 +27,7 @@
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/root_dev.h>
#include <linux/kernel.h>
#include <asm/processor.h>
#include <asm/machdep.h>
@ -94,6 +95,8 @@ extern unsigned long iSeries_recal_titan;
static int mf_initialized;
static unsigned long cmd_mem_limit;
struct MemoryBlock {
unsigned long absStart;
unsigned long absEnd;
@ -341,23 +344,6 @@ static void __init iSeries_init_early(void)
*/
iommu_init_early_iSeries();
iSeries_get_cmdline();
/* Save unparsed command line copy for /proc/cmdline */
strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
/* Parse early parameters, in particular mem=x */
parse_early_param();
if (memory_limit) {
if (memory_limit < systemcfg->physicalMemorySize)
systemcfg->physicalMemorySize = memory_limit;
else {
printk("Ignoring mem=%lu >= ram_top.\n", memory_limit);
memory_limit = 0;
}
}
/* Initialize machine-dependency vectors */
#ifdef CONFIG_SMP
smp_init_iSeries();
@ -971,6 +957,8 @@ void build_flat_dt(struct iseries_flat_dt *dt)
/* /chosen */
dt_start_node(dt, "chosen");
dt_prop_u32(dt, "linux,platform", PLATFORM_ISERIES_LPAR);
if (cmd_mem_limit)
dt_prop_u64(dt, "linux,memory-limit", cmd_mem_limit);
dt_end_node(dt);
dt_cpus(dt);
@ -990,7 +978,27 @@ void * __init iSeries_early_setup(void)
*/
build_iSeries_Memory_Map();
iSeries_get_cmdline();
/* Save unparsed command line copy for /proc/cmdline */
strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
/* Parse early parameters, in particular mem=x */
parse_early_param();
build_flat_dt(&iseries_dt);
return (void *) __pa(&iseries_dt);
}
/*
* On iSeries we just parse the mem=X option from the command line.
* On pSeries it's a bit more complicated, see prom_init_mem()
*/
static int __init early_parsemem(char *p)
{
if (p)
cmd_mem_limit = ALIGN(memparse(p, &p), PAGE_SIZE);
return 0;
}
early_param("mem", early_parsemem);