Hi David,
Le 19/08/2011 19:57, David Long a écrit :
Reserve any memory above 768MB to prevent u-boot from relocating fdt or initrd data into memory that Linux cannot reference during early boot. Code taken (with modifications) from the powerpc bootm.c.
What exactly prevents ARM Linux from booting when FDT or initrd are above 768MB? Can this limitation not be lifter on the Linux side?
Also:
Signed-off-by: David A. Longdave.long@linaro.org
arch/arm/lib/bootm.c | 24 +++++++++++++++++++++++- 1 files changed, 23 insertions(+), 1 deletions(-)
diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c index 802e833..437ef35 100644 --- a/arch/arm/lib/bootm.c +++ b/arch/arm/lib/bootm.c @@ -32,6 +32,10 @@
DECLARE_GLOBAL_DATA_PTR;
+#ifndef CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE +#define CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE (768*1024*1024) +#endif
I'd tend to think that if no max size was defined, then we should not limit.
- #if defined (CONFIG_SETUP_MEMORY_TAGS) || \ defined (CONFIG_CMDLINE_TAG) || \ defined (CONFIG_INITRD_TAG) || \
@@ -60,7 +64,25 @@ static int bootm_linux_fdt(int machid, bootm_headers_t *images);
void arch_lmb_reserve(struct lmb *lmb) {
- ulong sp;
- phys_size_t bootm_size;
- ulong size, sp, bootmap_base;
- bootmap_base = getenv_bootm_low();
- bootm_size = getenv_bootm_size();
+#ifdef DEBUG
- if (((u64)bootmap_base + bootm_size)>
(CONFIG_SYS_SDRAM_BASE + (u64) gd->ram_size))puts("WARNING: bootm_low + bootm_size exceed total memory\n");+#endif
size = min(bootm_size, CONFIG_SYS_LINUX_LOWMEM_MAX_SIZE);
if (size< bootm_size) {
ulong base = bootmap_base + size;printf("WARNING: adjusting available memory to %lx\n", size);lmb_reserve(lmb, base, bootm_size - size);}
/*
- Booting a (Linux) kernel image
Amicalement,