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[POWERPC] Move iSeries initrd logic into device tree 

Remove the iSeries initrd logic, instead just store the initrd location and
size in the device tree so generic code can do the rest for us.

The iSeries code had a "feature" which the generic code lacks, ie. if the
compressed initrd is bigger than the configured ram disk size, we make
the ram disk size bigger. That's bogus, as the compressed size of the initrd
tells us nothing about how big the ram disk needs to be. If the ram disk
isn't big enough you just need to make CONFIG_BLK_DEV_RAM_SIZE larger.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Michael Ellerman 2006-10-18 15:53:20 +10:00 committed by Paul Mackerras
parent 83efafb301
commit 41999295b6
2 changed files with 13 additions and 34 deletions
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15
arch/powerpc/platforms/iseries/dt.c
View File

@ -41,6 +41,7 @@
#include "call_pci.h"
#include "pci.h"
#include "it_exp_vpd_panel.h"
#include "naca.h"
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
@ -205,13 +206,11 @@ static void __init dt_prop_u32(struct iseries_flat_dt *dt, const char *name,
dt_prop(dt, name, &data, sizeof(u32));
}
#ifdef notyet
static void __init dt_prop_u64(struct iseries_flat_dt *dt, const char *name,
u64 data)
{
dt_prop(dt, name, &data, sizeof(u64));
}
#endif
static void __init dt_prop_u64_list(struct iseries_flat_dt *dt,
const char *name, u64 *data, int n)
@ -306,6 +305,17 @@ static void __init dt_model(struct iseries_flat_dt *dt)
dt_prop_u32(dt, "ibm,partition-no", HvLpConfig_getLpIndex());
}
static void __init dt_initrd(struct iseries_flat_dt *dt)
{
#ifdef CONFIG_BLK_DEV_INITRD
if (naca.xRamDisk) {
dt_prop_u64(dt, "linux,initrd-start", (u64)naca.xRamDisk);
dt_prop_u64(dt, "linux,initrd-end",
(u64)naca.xRamDisk + naca.xRamDiskSize * HW_PAGE_SIZE);
}
#endif
}
static void __init dt_do_vdevice(struct iseries_flat_dt *dt,
const char *name, u32 reg, int unit,
const char *type, const char *compat, int end)
@ -641,6 +651,7 @@ void * __init build_flat_dt(unsigned long phys_mem_size)
/* /chosen */
dt_start_node(iseries_dt, "chosen");
dt_prop_str(iseries_dt, "bootargs", cmd_line);
dt_initrd(iseries_dt);
dt_end_node(iseries_dt);
dt_cpus(iseries_dt);

32
arch/powerpc/platforms/iseries/setup.c
View File

@ -21,7 +21,6 @@
#include <linux/smp.h>
#include <linux/param.h>
#include <linux/string.h>
#include <linux/initrd.h>
#include <linux/seq_file.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
@ -80,8 +79,6 @@ extern void iSeries_pci_final_fixup(void);
static void iSeries_pci_final_fixup(void) { }
#endif
extern int rd_size; /* Defined in drivers/block/rd.c */
extern unsigned long iSeries_recal_tb;
extern unsigned long iSeries_recal_titan;
@ -295,24 +292,6 @@ static void __init iSeries_init_early(void)
{
DBG(" -> iSeries_init_early()\n");
#if defined(CONFIG_BLK_DEV_INITRD)
/*
* If the init RAM disk has been configured and there is
* a non-zero starting address for it, set it up
*/
if (naca.xRamDisk) {
initrd_start = (unsigned long)__va(naca.xRamDisk);
initrd_end = initrd_start + naca.xRamDiskSize * HW_PAGE_SIZE;
initrd_below_start_ok = 1; // ramdisk in kernel space
ROOT_DEV = Root_RAM0;
if (((rd_size * 1024) / HW_PAGE_SIZE) < naca.xRamDiskSize)
rd_size = (naca.xRamDiskSize * HW_PAGE_SIZE) / 1024;
} else
#endif /* CONFIG_BLK_DEV_INITRD */
{
/* ROOT_DEV = MKDEV(VIODASD_MAJOR, 1); */
}
iSeries_recal_tb = get_tb();
iSeries_recal_titan = HvCallXm_loadTod();
@ -331,17 +310,6 @@ static void __init iSeries_init_early(void)
mf_init();
/* If we were passed an initrd, set the ROOT_DEV properly if the values
* look sensible. If not, clear initrd reference.
*/
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE &&
initrd_end > initrd_start)
ROOT_DEV = Root_RAM0;
else
initrd_start = initrd_end = 0;
#endif /* CONFIG_BLK_DEV_INITRD */
DBG(" <- iSeries_init_early()\n");
}