[PATCH] powerpc: Fixed memory reserve map layout
From: Kumar Gala <hidden>
Date: 2006-01-11 23:57:13
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
powerpc: Fixed memory reserve map layout The memory reserve map is suppose to be a pair of 64-bit integers to represent each region. On ppc32 the code was treating the pair as two 32-bit integers. Additional the prom_init code was producing the wrong layout on ppc32. Added a simple check to try to provide backwards compatibility. Signed-off-by: Kumar Gala <redacted> --- commit dc15eeb7325279bf9e5b49f79567fa0886cd8c31 tree e724bd9d855d5f2a71720742c7ec279609c1aaaa parent aa30a75885b935a7f09a1312e792f96cc338e505 author Kumar Gala [off-list ref] Wed, 11 Jan 2006 18:02:36 -0600 committer Kumar Gala [off-list ref] Wed, 11 Jan 2006 18:02:36 -0600 arch/powerpc/kernel/prom.c | 28 ++++++++++++++++++++++++---- arch/powerpc/kernel/prom_init.c | 8 ++++---- 2 files changed, 28 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 34ab0da..02e2115 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c@@ -1100,17 +1100,37 @@ static int __init early_init_dt_scan_mem static void __init early_reserve_mem(void) { - unsigned long base, size; - unsigned long *reserve_map; + u64 base, size; + u64 *reserve_map; - reserve_map = (unsigned long *)(((unsigned long)initial_boot_params) + + reserve_map = (u64 *)(((unsigned long)initial_boot_params) + initial_boot_params->off_mem_rsvmap); +#ifdef CONFIG_PPC32 + /* + * Handle the case where we might be booting from an old kexec + * image that setup the mem_rsvmap as pairs of 32-bit values + */ + if (*reserve_map > 0xffffffffull) { + u32 base_32, size_32; + u32 *reserve_map_32 = (u32 *)reserve_map; + + while (1) { + base_32 = *(reserve_map_32++); + size_32 = *(reserve_map_32++); + if (size_32 == 0) + break; + DBG("reserving: %lx -> %lx\n", base_32, size_32); + lmb_reserve(base_32, size_32); + } + return; + } +#endif while (1) { base = *(reserve_map++); size = *(reserve_map++); if (size == 0) break; - DBG("reserving: %lx -> %lx\n", base, size); + DBG("reserving: %llx -> %llx\n", base, size); lmb_reserve(base, size); }
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index e381f2f..d963a12 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c@@ -137,8 +137,8 @@ struct prom_t { }; struct mem_map_entry { - unsigned long base; - unsigned long size; + u64 base; + u64 size; }; typedef u32 cell_t;
@@ -897,9 +897,9 @@ static unsigned long __init prom_next_ce * If problems seem to show up, it would be a good start to track * them down. */ -static void reserve_mem(unsigned long base, unsigned long size) +static void reserve_mem(u64 base, u64 size) { - unsigned long top = base + size; + u64 top = base + size; unsigned long cnt = RELOC(mem_reserve_cnt); if (size == 0)