[RFC/PATCH] [POWERPC] Make lmb support large physical addressing

From: Becky Bruce
Date: Wed Feb 13 2008 - 17:48:14 EST

Convert the lmb code to use phys_addr_t instead of unsigned long for
physical addresses and sizes. This is needed to support large amounts
of RAM on 32-bit systems that support 36-bit physical addressing.

Built/booted on mpc8641; build tested on pasemi and 44x.

Signed-off-by: Becky Bruce <becky.bruce@xxxxxxxxxxxxx>
---
Folks,

This has been sitting in my tree for a few days, and now it looks like
David M. has submitted a patch that changes the lmb code to be shared
between sparc and powerpc. Sparc has no notion of a phys_addr_t.
Should we just use u64 everywhere in this code instead? Thoughts?

Cheers,
Becky

arch/powerpc/mm/lmb.c | 92 +++++++++++++++++++++++----------------------
include/asm-powerpc/lmb.h | 38 +++++++++---------
2 files changed, 66 insertions(+), 64 deletions(-)

diff --git a/arch/powerpc/mm/lmb.c b/arch/powerpc/mm/lmb.c
index 4ce23bc..31d86ff 100644
--- a/arch/powerpc/mm/lmb.c
+++ b/arch/powerpc/mm/lmb.c
@@ -41,33 +41,34 @@ void lmb_dump_all(void)

DBG("lmb_dump_all:\n");
DBG(" memory.cnt = 0x%lx\n", lmb.memory.cnt);
- DBG(" memory.size = 0x%lx\n", lmb.memory.size);
+ DBG(" memory.size = 0x%llx\n",
+ (unsigned long long)lmb.memory.size);
for (i=0; i < lmb.memory.cnt ;i++) {
- DBG(" memory.region[0x%x].base = 0x%lx\n",
- i, lmb.memory.region[i].base);
- DBG(" .size = 0x%lx\n",
- lmb.memory.region[i].size);
+ DBG(" memory.region[0x%x].base = 0x%llx\n",
+ i, (unsigned long long)lmb.memory.region[i].base);
+ DBG(" .size = 0x%llx\n",
+ (unsigned long long)lmb.memory.region[i].size);
}

DBG("\n reserved.cnt = 0x%lx\n", lmb.reserved.cnt);
DBG(" reserved.size = 0x%lx\n", lmb.reserved.size);
for (i=0; i < lmb.reserved.cnt ;i++) {
- DBG(" reserved.region[0x%x].base = 0x%lx\n",
- i, lmb.reserved.region[i].base);
- DBG(" .size = 0x%lx\n",
- lmb.reserved.region[i].size);
+ DBG(" reserved.region[0x%x].base = 0x%llx\n",
+ i, (unsigned long long)lmb.reserved.region[i].base);
+ DBG(" .size = 0x%llx\n",
+ (unsigned long long)lmb.reserved.region[i].size);
}
#endif /* DEBUG */
}

-static unsigned long __init lmb_addrs_overlap(unsigned long base1,
- unsigned long size1, unsigned long base2, unsigned long size2)
+static unsigned long __init lmb_addrs_overlap(phys_addr_t base1,
+ phys_addr_t size1, phys_addr_t base2, phys_addr_t size2)
{
return ((base1 < (base2+size2)) && (base2 < (base1+size1)));
}

-static long __init lmb_addrs_adjacent(unsigned long base1, unsigned long size1,
- unsigned long base2, unsigned long size2)
+static long __init lmb_addrs_adjacent(phys_addr_t base1, phys_addr_t size1,
+ phys_addr_t base2, phys_addr_t size2)
{
if (base2 == base1 + size1)
return 1;
@@ -80,10 +81,10 @@ static long __init lmb_addrs_adjacent(unsigned long base1, unsigned long size1,
static long __init lmb_regions_adjacent(struct lmb_region *rgn,
unsigned long r1, unsigned long r2)
{
- unsigned long base1 = rgn->region[r1].base;
- unsigned long size1 = rgn->region[r1].size;
- unsigned long base2 = rgn->region[r2].base;
- unsigned long size2 = rgn->region[r2].size;
+ phys_addr_t base1 = rgn->region[r1].base;
+ phys_addr_t size1 = rgn->region[r1].size;
+ phys_addr_t base2 = rgn->region[r2].base;
+ phys_addr_t size2 = rgn->region[r2].size;

return lmb_addrs_adjacent(base1, size1, base2, size2);
}
@@ -135,16 +136,16 @@ void __init lmb_analyze(void)
}

/* This routine called with relocation disabled. */
-static long __init lmb_add_region(struct lmb_region *rgn, unsigned long base,
- unsigned long size)
+static long __init lmb_add_region(struct lmb_region *rgn, phys_addr_t base,
+ phys_addr_t size)
{
unsigned long coalesced = 0;
long adjacent, i;

/* First try and coalesce this LMB with another. */
for (i=0; i < rgn->cnt; i++) {
- unsigned long rgnbase = rgn->region[i].base;
- unsigned long rgnsize = rgn->region[i].size;
+ phys_addr_t rgnbase = rgn->region[i].base;
+ phys_addr_t rgnsize = rgn->region[i].size;

if ((rgnbase == base) && (rgnsize == size))
/* Already have this region, so we're done */
@@ -191,7 +192,7 @@ static long __init lmb_add_region(struct lmb_region *rgn, unsigned long base,
}

/* This routine may be called with relocation disabled. */
-long __init lmb_add(unsigned long base, unsigned long size)
+long __init lmb_add(phys_addr_t base, phys_addr_t size)
{
struct lmb_region *_rgn = &(lmb.memory);

@@ -203,7 +204,7 @@ long __init lmb_add(unsigned long base, unsigned long size)

}

-long __init lmb_reserve(unsigned long base, unsigned long size)
+long __init lmb_reserve(phys_addr_t base, phys_addr_t size)
{
struct lmb_region *_rgn = &(lmb.reserved);

@@ -212,14 +213,14 @@ long __init lmb_reserve(unsigned long base, unsigned long size)
return lmb_add_region(_rgn, base, size);
}

-long __init lmb_overlaps_region(struct lmb_region *rgn, unsigned long base,
- unsigned long size)
+long __init lmb_overlaps_region(struct lmb_region *rgn, phys_addr_t base,
+ phys_addr_t size)
{
unsigned long i;

for (i=0; i < rgn->cnt; i++) {
- unsigned long rgnbase = rgn->region[i].base;
- unsigned long rgnsize = rgn->region[i].size;
+ phys_addr_t rgnbase = rgn->region[i].base;
+ phys_addr_t rgnsize = rgn->region[i].size;
if ( lmb_addrs_overlap(base,size,rgnbase,rgnsize) ) {
break;
}
@@ -228,30 +229,30 @@ long __init lmb_overlaps_region(struct lmb_region *rgn, unsigned long base,
return (i < rgn->cnt) ? i : -1;
}

-unsigned long __init lmb_alloc(unsigned long size, unsigned long align)
+phys_addr_t __init lmb_alloc(phys_addr_t size, phys_addr_t align)
{
return lmb_alloc_base(size, align, LMB_ALLOC_ANYWHERE);
}

-unsigned long __init lmb_alloc_base(unsigned long size, unsigned long align,
- unsigned long max_addr)
+phys_addr_t __init lmb_alloc_base(phys_addr_t size, phys_addr_t align,
+ phys_addr_t max_addr)
{
- unsigned long alloc;
+ phys_addr_t alloc;

alloc = __lmb_alloc_base(size, align, max_addr);

if (alloc == 0)
- panic("ERROR: Failed to allocate 0x%lx bytes below 0x%lx.\n",
- size, max_addr);
+ panic("ERROR: Failed to allocate 0x%llx bytes below 0x%llx.\n",
+ (unsigned long long)size, (unsigned long long)max_addr);

return alloc;
}

-unsigned long __init __lmb_alloc_base(unsigned long size, unsigned long align,
- unsigned long max_addr)
+phys_addr_t __init __lmb_alloc_base(phys_addr_t size, phys_addr_t align,
+ phys_addr_t max_addr)
{
long i, j;
- unsigned long base = 0;
+ phys_addr_t base = 0;

BUG_ON(0 == size);

@@ -261,8 +262,8 @@ unsigned long __init __lmb_alloc_base(unsigned long size, unsigned long align,
max_addr = __max_low_memory;
#endif
for (i = lmb.memory.cnt-1; i >= 0; i--) {
- unsigned long lmbbase = lmb.memory.region[i].base;
- unsigned long lmbsize = lmb.memory.region[i].size;
+ phys_addr_t lmbbase = lmb.memory.region[i].base;
+ phys_addr_t lmbsize = lmb.memory.region[i].size;

if (max_addr == LMB_ALLOC_ANYWHERE)
base = _ALIGN_DOWN(lmbbase + lmbsize - size, align);
@@ -290,12 +291,12 @@ unsigned long __init __lmb_alloc_base(unsigned long size, unsigned long align,
}

/* You must call lmb_analyze() before this. */
-unsigned long __init lmb_phys_mem_size(void)
+phys_addr_t __init lmb_phys_mem_size(void)
{
return lmb.memory.size;
}

-unsigned long __init lmb_end_of_DRAM(void)
+phys_addr_t __init lmb_end_of_DRAM(void)
{
int idx = lmb.memory.cnt - 1;

@@ -303,9 +304,10 @@ unsigned long __init lmb_end_of_DRAM(void)
}

/* You must call lmb_analyze() after this. */
-void __init lmb_enforce_memory_limit(unsigned long memory_limit)
+void __init lmb_enforce_memory_limit(phys_addr_t memory_limit)
{
- unsigned long i, limit;
+ unsigned long i;
+ phys_addr_t limit;
struct lmb_property *p;

if (! memory_limit)
@@ -343,13 +345,13 @@ void __init lmb_enforce_memory_limit(unsigned long memory_limit)
}
}

-int __init lmb_is_reserved(unsigned long addr)
+int __init lmb_is_reserved(phys_addr_t addr)
{
int i;

for (i = 0; i < lmb.reserved.cnt; i++) {
- unsigned long upper = lmb.reserved.region[i].base +
- lmb.reserved.region[i].size - 1;
+ phys_addr_t upper = lmb.reserved.region[i].base +
+ lmb.reserved.region[i].size - 1;
if ((addr >= lmb.reserved.region[i].base) && (addr <= upper))
return 1;
}
diff --git a/include/asm-powerpc/lmb.h b/include/asm-powerpc/lmb.h
index 5d1dc48..2233f51 100644
--- a/include/asm-powerpc/lmb.h
+++ b/include/asm-powerpc/lmb.h
@@ -20,19 +20,19 @@
#define MAX_LMB_REGIONS 128

struct lmb_property {
- unsigned long base;
- unsigned long size;
+ phys_addr_t base;
+ phys_addr_t size;
};

struct lmb_region {
unsigned long cnt;
- unsigned long size;
+ phys_addr_t size;
struct lmb_property region[MAX_LMB_REGIONS+1];
};

struct lmb {
unsigned long debug;
- unsigned long rmo_size;
+ phys_addr_t rmo_size;
struct lmb_region memory;
struct lmb_region reserved;
};
@@ -41,36 +41,36 @@ extern struct lmb lmb;

extern void __init lmb_init(void);
extern void __init lmb_analyze(void);
-extern long __init lmb_add(unsigned long base, unsigned long size);
-extern long __init lmb_reserve(unsigned long base, unsigned long size);
-extern unsigned long __init lmb_alloc(unsigned long size, unsigned long align);
-extern unsigned long __init lmb_alloc_base(unsigned long size,
- unsigned long align, unsigned long max_addr);
-extern unsigned long __init __lmb_alloc_base(unsigned long size,
- unsigned long align, unsigned long max_addr);
-extern unsigned long __init lmb_phys_mem_size(void);
-extern unsigned long __init lmb_end_of_DRAM(void);
-extern void __init lmb_enforce_memory_limit(unsigned long memory_limit);
-extern int __init lmb_is_reserved(unsigned long addr);
+extern long __init lmb_add(phys_addr_t base, phys_addr_t size);
+extern long __init lmb_reserve(phys_addr_t base, phys_addr_t size);
+extern phys_addr_t __init lmb_alloc(phys_addr_t size, phys_addr_t align);
+extern phys_addr_t __init lmb_alloc_base(phys_addr_t size,
+ phys_addr_t, phys_addr_t max_addr);
+extern phys_addr_t __init __lmb_alloc_base(phys_addr_t size,
+ phys_addr_t align, phys_addr_t max_addr);
+extern phys_addr_t __init lmb_phys_mem_size(void);
+extern phys_addr_t __init lmb_end_of_DRAM(void);
+extern void __init lmb_enforce_memory_limit(phys_addr_t memory_limit);
+extern int __init lmb_is_reserved(phys_addr_t addr);

extern void lmb_dump_all(void);

-static inline unsigned long
+static inline phys_addr_t
lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
{
return type->region[region_nr].size;
}
-static inline unsigned long
+static inline phys_addr_t
lmb_size_pages(struct lmb_region *type, unsigned long region_nr)
{
return lmb_size_bytes(type, region_nr) >> PAGE_SHIFT;
}
-static inline unsigned long
+static inline phys_addr_t
lmb_start_pfn(struct lmb_region *type, unsigned long region_nr)
{
return type->region[region_nr].base >> PAGE_SHIFT;
}
-static inline unsigned long
+static inline phys_addr_t
lmb_end_pfn(struct lmb_region *type, unsigned long region_nr)
{
return lmb_start_pfn(type, region_nr) +
--
1.5.3.8

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