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[LMB]: Make lmb support large physical addressing
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Convert the lmb code to use u64 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.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Becky Bruce authored and David S. Miller committed Feb 14, 2008
1 parent 27e6672 commit e5f2709
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Showing 2 changed files with 65 additions and 66 deletions.
38 changes: 19 additions & 19 deletions include/linux/lmb.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -19,19 +19,19 @@
#define MAX_LMB_REGIONS 128

struct lmb_property {
unsigned long base;
unsigned long size;
u64 base;
u64 size;
};

struct lmb_region {
unsigned long cnt;
unsigned long size;
u64 size;
struct lmb_property region[MAX_LMB_REGIONS+1];
};

struct lmb {
unsigned long debug;
unsigned long rmo_size;
u64 rmo_size;
struct lmb_region memory;
struct lmb_region reserved;
};
Expand All @@ -40,36 +40,36 @@ 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(u64 base, u64 size);
extern long __init lmb_reserve(u64 base, u64 size);
extern u64 __init lmb_alloc(u64 size, u64 align);
extern u64 __init lmb_alloc_base(u64 size,
u64, u64 max_addr);
extern u64 __init __lmb_alloc_base(u64 size,
u64 align, u64 max_addr);
extern u64 __init lmb_phys_mem_size(void);
extern u64 __init lmb_end_of_DRAM(void);
extern void __init lmb_enforce_memory_limit(u64 memory_limit);
extern int __init lmb_is_reserved(u64 addr);

extern void lmb_dump_all(void);

static inline unsigned long
static inline u64
lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
{
return type->region[region_nr].size;
}
static inline unsigned long
static inline u64
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 u64
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 u64
lmb_end_pfn(struct lmb_region *type, unsigned long region_nr)
{
return lmb_start_pfn(type, region_nr) +
Expand Down
93 changes: 46 additions & 47 deletions lib/lmb.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -34,33 +34,34 @@ 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(u64 base1,
u64 size1, u64 base2, u64 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(u64 base1, u64 size1,
u64 base2, u64 size2)
{
if (base2 == base1 + size1)
return 1;
Expand All @@ -73,10 +74,10 @@ 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;
u64 base1 = rgn->region[r1].base;
u64 size1 = rgn->region[r1].size;
u64 base2 = rgn->region[r2].base;
u64 size2 = rgn->region[r2].size;

return lmb_addrs_adjacent(base1, size1, base2, size2);
}
Expand Down Expand Up @@ -128,8 +129,7 @@ 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, u64 base, u64 size)
{
unsigned long coalesced = 0;
long adjacent, i;
Expand All @@ -142,8 +142,8 @@ static long __init lmb_add_region(struct lmb_region *rgn, unsigned long base,

/* 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;
u64 rgnbase = rgn->region[i].base;
u64 rgnsize = rgn->region[i].size;

if ((rgnbase == base) && (rgnsize == size))
/* Already have this region, so we're done */
Expand Down Expand Up @@ -190,7 +190,7 @@ 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(u64 base, u64 size)
{
struct lmb_region *_rgn = &(lmb.memory);

Expand All @@ -202,7 +202,7 @@ long __init lmb_add(unsigned long base, unsigned long size)

}

long __init lmb_reserve(unsigned long base, unsigned long size)
long __init lmb_reserve(u64 base, u64 size)
{
struct lmb_region *_rgn = &(lmb.reserved);

Expand All @@ -211,14 +211,14 @@ 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, u64 base,
u64 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;
u64 rgnbase = rgn->region[i].base;
u64 rgnsize = rgn->region[i].size;
if ( lmb_addrs_overlap(base,size,rgnbase,rgnsize) ) {
break;
}
Expand All @@ -227,40 +227,38 @@ 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)
u64 __init lmb_alloc(u64 size, u64 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)
u64 __init lmb_alloc_base(u64 size, u64 align, u64 max_addr)
{
unsigned long alloc;
u64 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;
}

static unsigned long lmb_align_down(unsigned long addr, unsigned long size)
static u64 lmb_align_down(u64 addr, u64 size)
{
return addr & ~(size - 1);
}

static unsigned long lmb_align_up(unsigned long addr, unsigned long size)
static u64 lmb_align_up(u64 addr, u64 size)
{
return (addr + (size - 1)) & ~(size - 1);
}

unsigned long __init __lmb_alloc_base(unsigned long size, unsigned long align,
unsigned long max_addr)
u64 __init __lmb_alloc_base(u64 size, u64 align, u64 max_addr)
{
long i, j;
unsigned long base = 0;
u64 base = 0;

BUG_ON(0 == size);

Expand All @@ -269,8 +267,8 @@ unsigned long __init __lmb_alloc_base(unsigned long size, unsigned long align,
max_addr = LMB_REAL_LIMIT;

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;
u64 lmbbase = lmb.memory.region[i].base;
u64 lmbsize = lmb.memory.region[i].size;

if (max_addr == LMB_ALLOC_ANYWHERE)
base = lmb_align_down(lmbbase + lmbsize - size, align);
Expand Down Expand Up @@ -299,22 +297,23 @@ 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)
u64 __init lmb_phys_mem_size(void)
{
return lmb.memory.size;
}

unsigned long __init lmb_end_of_DRAM(void)
u64 __init lmb_end_of_DRAM(void)
{
int idx = lmb.memory.cnt - 1;

return (lmb.memory.region[idx].base + lmb.memory.region[idx].size);
}

/* You must call lmb_analyze() after this. */
void __init lmb_enforce_memory_limit(unsigned long memory_limit)
void __init lmb_enforce_memory_limit(u64 memory_limit)
{
unsigned long i, limit;
unsigned long i;
u64 limit;
struct lmb_property *p;

if (! memory_limit)
Expand Down Expand Up @@ -352,13 +351,13 @@ void __init lmb_enforce_memory_limit(unsigned long memory_limit)
}
}

int __init lmb_is_reserved(unsigned long addr)
int __init lmb_is_reserved(u64 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;
u64 upper = lmb.reserved.region[i].base +
lmb.reserved.region[i].size - 1;
if ((addr >= lmb.reserved.region[i].base) && (addr <= upper))
return 1;
}
Expand Down

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