[U-Boot-Users] [PATCH 1/4] Add ALIGN() macro

[U-Boot-Users] [PATCH 1/4] Add ALIGN() macro

[Andy Fleming]

ALIGN() returns the smallest aligned value greater than the passed
in address or size.  Taken from Linux.

Signed-off-by: Andy Fleming <afleming@freescale.com>
---
 include/common.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/include/common.h b/include/common.h
index d0f5704..68e0cbc 100644
--- a/include/common.h
+++ b/include/common.h
@@ -671,6 +671,9 @@ void __attribute__((weak)) show_boot_progress (int val);
 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
 #define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
 
+#define ALIGN(x,a)              __ALIGN_MASK(x,(typeof(x))(a)-1)
+#define __ALIGN_MASK(x,mask)    (((x)+(mask))&~(mask))
+
 /* Multicore arch functions */
 #ifdef CONFIG_MP
 int cpu_status(int nr);
-- 
1.5.4.GIT

[U-Boot-Users] [PATCH 2/4] Add lmb_free

[Andy Fleming]

lmb_free allows us to unreserve some memory so we can use lmb_alloc_base or
lmb_reserve to temporarily reserve some memory.

Signed-off-by: Andy Fleming <afleming@freescale.com>
---
 lib_generic/lmb.c |   49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 49 insertions(+), 0 deletions(-)

diff --git a/lib_generic/lmb.c b/lib_generic/lmb.c
index 3b8c805..a34e2d3 100644
--- a/lib_generic/lmb.c
+++ b/lib_generic/lmb.c
@@ -180,6 +180,55 @@ long lmb_add(struct lmb *lmb, ulong base, ulong size)
 	return lmb_add_region(_rgn, base, size);
 }
 
+long lmb_free(struct lmb *lmb, u64 base, u64 size)
+{
+	struct lmb_region *rgn = &(lmb->reserved);
+	u64 rgnbegin, rgnend;
+	u64 end = base + size;
+	int i;
+
+	rgnbegin = rgnend = 0; /* supress gcc warnings */
+
+	/* Find the region where (base, size) belongs to */
+	for (i=0; i < rgn->cnt; i++) {
+		rgnbegin = rgn->region[i].base;
+		rgnend = rgnbegin + rgn->region[i].size;
+
+		if ((rgnbegin <= base) && (end <= rgnend))
+			break;
+	}
+
+	/* Didn't find the region */
+	if (i == rgn->cnt)
+		return -1;
+
+	/* Check to see if we are removing entire region */
+	if ((rgnbegin == base) && (rgnend == end)) {
+		lmb_remove_region(rgn, i);
+		return 0;
+	}
+
+	/* Check to see if region is matching at the front */
+	if (rgnbegin == base) {
+		rgn->region[i].base = end;
+		rgn->region[i].size -= size;
+		return 0;
+	}
+
+	/* Check to see if the region is matching at the end */
+	if (rgnend == end) {
+		rgn->region[i].size -= size;
+		return 0;
+	}
+
+	/*
+	 * We need to split the entry -  adjust the current one to the
+	 * beginging of the hole and add the region after hole.
+	 */
+	rgn->region[i].size = base - rgn->region[i].base;
+	return lmb_add_region(rgn, end, rgnend - end);
+}
+
 long lmb_reserve(struct lmb *lmb, ulong base, ulong size)
 {
 	struct lmb_region *_rgn = &(lmb->reserved);
-- 
1.5.4.GIT

[U-Boot-Users] [PATCH 3/4] Fix an underflow bug in __lmb_alloc_base

[Andy Fleming]

__lmb_alloc_base can underflow if it fails to find free space.  This was fixed
in linux with commit d9024df02ffe74d723d97d552f86de3b34beb8cc.  This patch
merely updates __lmb_alloc_base to resemble the current version in Linux.

Signed-off-by: Andy Fleming <afleming@freescale.com>
---
 lib_generic/lmb.c |   34 +++++++++++++++++++---------------
 1 files changed, 19 insertions(+), 15 deletions(-)

diff --git a/lib_generic/lmb.c b/lib_generic/lmb.c
index a34e2d3..c27a540 100644
--- a/lib_generic/lmb.c
+++ b/lib_generic/lmb.c
@@ -284,11 +284,14 @@ ulong __lmb_alloc_base(struct lmb *lmb, ulong size, ulong align, ulong max_addr)
 {
 	long i, j;
 	ulong base = 0;
+	ulong res_base;
 
 	for (i = lmb->memory.cnt-1; i >= 0; i--) {
 		ulong lmbbase = lmb->memory.region[i].base;
 		ulong lmbsize = lmb->memory.region[i].size;
 
+		if (lmbsize < size)
+			continue;
 		if (max_addr == LMB_ALLOC_ANYWHERE)
 			base = lmb_align_down(lmbbase + lmbsize - size, align);
 		else if (lmbbase < max_addr) {
@@ -297,22 +300,23 @@ ulong __lmb_alloc_base(struct lmb *lmb, ulong size, ulong align, ulong max_addr)
 		} else
 			continue;
 
-		while ((lmbbase <= base) &&
-		       ((j = lmb_overlaps_region(&(lmb->reserved), base, size)) >= 0) )
-			base = lmb_align_down(lmb->reserved.region[j].base - size,
-					      align);
-
-		if ((base != 0) && (lmbbase <= base))
-			break;
+		while (base && lmbbase <= base) {
+			j = lmb_overlaps_region(&lmb->reserved, base, size);
+			if (j < 0) {
+				/* This area isn't reserved, take it */
+				if (lmb_add_region(&lmb->reserved, base,
+							lmb_align_up(size,
+								align)) < 0)
+					return 0;
+				return base;
+			}
+			res_base = lmb->reserved.region[j].base;
+			if (res_base < size)
+				break;
+			base = lmb_align_down(res_base - size, align);
+		}
 	}
-
-	if (i < 0)
-		return 0;
-
-	if (lmb_add_region(&(lmb->reserved), base, lmb_align_up(size, align)) < 0)
-		return 0;
-
-	return base;
+	return 0;
 }
 
 int lmb_is_reserved(struct lmb *lmb, ulong addr)
-- 
1.5.4.GIT

[U-Boot-Users] [PATCH 4/4] Resize device tree to allow space for board changes and the chosen node

[Andy Fleming]

Current code requires that a compiled device tree have space added to the end to
leave room for extra nodes added by board code (and the chosen node).  This
requires that device tree creators anticipate how much space U-Boot will add to
the tree, which is absurd.  Ideally, the code would resize and/or relocate the
tree when it needed more space, but this would require a systemic change to the
fdt code, which is non-trivial.  Instead, we resize the tree inside
boot_relocate_fdt, reserving either the remainder of the bootmap (in the case
where the fdt is inside the bootmap), or adding CFG_FDT_PAD bytes to the size.

Signed-off-by: Andy Fleming <afleming@freescale.com>
---
 lib_ppc/bootm.c |   66 ++++++++++++++++++++++++++++++++++++++++++++++++------
 1 files changed, 58 insertions(+), 8 deletions(-)

diff --git a/lib_ppc/bootm.c b/lib_ppc/bootm.c
index 9194fd8..85e959a 100644
--- a/lib_ppc/bootm.c
+++ b/lib_ppc/bootm.c
@@ -51,6 +51,10 @@ static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
 #include <asm/cache.h>
 #endif
 
+#ifndef CFG_FDT_PAD
+#define CFG_FDT_PAD 0x3000
+#endif
+
 DECLARE_GLOBAL_DATA_PTR;
 
 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
@@ -189,6 +193,44 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
 		ft_board_setup(of_flat_tree, gd->bd);
 #endif
 	}
+
+	/* Fixup the fdt memreserve now that we know how big it is */
+	if (of_flat_tree) {
+		int j;
+		uint64_t addr, size;
+		int total = fdt_num_mem_rsv(of_flat_tree);
+		uint actualsize;
+
+		for (j = 0; j < total; j++) {
+			fdt_get_mem_rsv(of_flat_tree, j, &addr, &size);
+			if (addr == (uint64_t)of_flat_tree) {
+				fdt_del_mem_rsv(of_flat_tree, j);
+				break;
+			}
+		}
+
+		/* Delete the old LMB reservation */
+		lmb_free(lmb, of_flat_tree, fdt_totalsize(of_flat_tree));
+
+		/* Calculate the actual size of the fdt */
+		actualsize = fdt_off_dt_strings(of_flat_tree) +
+			fdt_size_dt_strings(of_flat_tree);
+
+		/* Make it so the fdt ends on a page boundary */
+		actualsize = ALIGN(actualsize, 0x1000);
+		actualsize = actualsize - ((uint)of_flat_tree & 0xfff);
+
+		/* Change the fdt header to reflect the correct size */
+		fdt_set_totalsize(of_flat_tree, actualsize);
+		of_size = actualsize;
+
+		/* Add the new reservation */
+		ret = fdt_add_mem_rsv(of_flat_tree, (uint)of_flat_tree,
+				of_size);
+
+		/* Create a new LMB reservation */
+		lmb_reserve(lmb, (ulong)of_flat_tree, of_size);
+	}
 #endif	/* CONFIG_OF_LIBFDT */
 
 	ret = boot_ramdisk_high (lmb, rd_data_start, rd_len, &initrd_start, &initrd_end);
@@ -711,22 +753,25 @@ static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
 #endif
 
 	/*
-	 * The blob must be within CFG_BOOTMAPSZ,
-	 * so we flag it to be copied if it is not.
+	 * The blob needs to be inside the boot mapping.
 	 */
-	if (fdt_blob >= (char *)CFG_BOOTMAPSZ)
+	if (fdt_blob < (char *)bootmap_base)
 		relocate = 1;
 
-	of_len = be32_to_cpu (fdt_totalsize (fdt_blob));
+	if ((fdt_blob + *of_size + CFG_FDT_PAD) >=
+			((char *)CFG_BOOTMAPSZ + bootmap_base))
+		relocate = 1;
 
 	/* move flattend device tree if needed */
 	if (relocate) {
 		int err;
-		ulong of_start;
+		ulong of_start = 0;
 
 		/* position on a 4K boundary before the alloc_current */
+		/* Make the fdt as large as possible */
+		of_len = *of_size + CFG_FDT_PAD;
 		of_start = lmb_alloc_base(lmb, of_len, 0x1000,
-					 (CFG_BOOTMAPSZ + bootmap_base));
+				(CFG_BOOTMAPSZ + bootmap_base));
 
 		if (of_start == 0) {
 			puts("device tree - allocation error\n");
@@ -734,7 +779,7 @@ static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
 		}
 
 		debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
-			(ulong)fdt_blob, (ulong)fdt_blob + of_len - 1,
+			(ulong)fdt_blob, (ulong)fdt_blob + *of_size - 1,
 			of_len, of_len);
 
 		printf ("   Loading Device Tree to %08lx, end %08lx ... ",
@@ -748,9 +793,14 @@ static int boot_relocate_fdt (struct lmb *lmb, ulong bootmap_base,
 		puts ("OK\n");
 
 		*of_flat_tree = (char *)of_start;
+		*of_size = of_len;
 	} else {
 		*of_flat_tree = fdt_blob;
-		lmb_reserve(lmb, (ulong)fdt, of_len);
+		of_len = (CFG_BOOTMAPSZ + bootmap_base) - (ulong)fdt_blob;
+		lmb_reserve(lmb, (ulong)fdt_blob, of_len);
+		fdt_set_totalsize(*of_flat_tree, of_len);
+
+		*of_size = of_len;
 	}
 
 	return 0;
-- 
1.5.4.GIT

[U-Boot-Users] [PATCH 2/4] Add lmb_free

[Jean-Christophe PLAGNIOL-VILLARD]

On 15:24 Tue 20 May     , Andy Fleming wrote:
> lmb_free allows us to unreserve some memory so we can use lmb_alloc_base or
> lmb_reserve to temporarily reserve some memory.
> 
> Signed-off-by: Andy Fleming <afleming@freescale.com>
> ---
>  lib_generic/lmb.c |   49 +++++++++++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 49 insertions(+), 0 deletions(-)
> 
> diff --git a/lib_generic/lmb.c b/lib_generic/lmb.c
> index 3b8c805..a34e2d3 100644
> --- a/lib_generic/lmb.c
> +++ b/lib_generic/lmb.c
> @@ -180,6 +180,55 @@ long lmb_add(struct lmb *lmb, ulong base, ulong size)
>  	return lmb_add_region(_rgn, base, size);
>  }
>  
> +long lmb_free(struct lmb *lmb, u64 base, u64 size)
> +{
> +	struct lmb_region *rgn = &(lmb->reserved);
> +	u64 rgnbegin, rgnend;
> +	u64 end = base + size;
> +	int i;
> +
> +	rgnbegin = rgnend = 0; /* supress gcc warnings */
> +
> +	/* Find the region where (base, size) belongs to */
> +	for (i=0; i < rgn->cnt; i++) {
please i = 0
> +		rgnbegin = rgn->region[i].base;
> +		rgnend = rgnbegin + rgn->region[i].size;
> +
> +		if ((rgnbegin <= base) && (end <= rgnend))
> +			break;
Best Regards,
J.

[U-Boot-Users] [PATCH 2/4] Add lmb_free

[Wolfgang Denk]

In message <20080520211104.GC18756@game.jcrosoft.org> you wrote:
>
> > +	for (i=0; i < rgn->cnt; i++) {
> please i = 0

Andy, please leave as it was.


Jean-Christophe - this is really nitpicking, and in my opinion your
version is more difficult to read.



Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
"I dislike companies that have a we-are-the-high-priests-of-hardware-
so-you'll-like-what-we-give-you attitude. I like commodity markets in
which iron-and-silicon hawkers know that they exist to  provide  fast
toys for software types like me to play with..."    - Eric S. Raymond

[U-Boot-Users] [PATCH 1/4] Add ALIGN() macro

[Jean-Christophe PLAGNIOL-VILLARD]

On 15:24 Tue 20 May     , Andy Fleming wrote:
> ALIGN() returns the smallest aligned value greater than the passed
> in address or size.  Taken from Linux.
> 
> Signed-off-by: Andy Fleming <afleming@freescale.com>
> ---
>  include/common.h |    3 +++
>  1 files changed, 3 insertions(+), 0 deletions(-)
> 
> diff --git a/include/common.h b/include/common.h
> index d0f5704..68e0cbc 100644
> --- a/include/common.h
> +++ b/include/common.h
> @@ -671,6 +671,9 @@ void __attribute__((weak)) show_boot_progress (int val);
>  #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
>  #define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
>  
> +#define ALIGN(x,a)              __ALIGN_MASK(x,(typeof(x))(a)-1)
> +#define __ALIGN_MASK(x,mask)    (((x)+(mask))&~(mask))
please fix coding style and use tab instead of space for indent

#define ALIGN(x, a)		__ALIGN_MASK(x, (typeof(x)) (a) - 1)
#define __ALIGN_MASK(x, mask)	(((x) + (mask)) & ~(mask))

Best Regards,
J.

[U-Boot-Users] [PATCH 1/4] Add ALIGN() macro

[Scott Wood]

Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 15:24 Tue 20 May     , Andy Fleming wrote:
>> ALIGN() returns the smallest aligned value greater than the passed
>> in address or size.  Taken from Linux.
>>
>> Signed-off-by: Andy Fleming <afleming@freescale.com>
>> ---
>>  include/common.h |    3 +++
>>  1 files changed, 3 insertions(+), 0 deletions(-)
>>
>> diff --git a/include/common.h b/include/common.h
>> index d0f5704..68e0cbc 100644
>> --- a/include/common.h
>> +++ b/include/common.h
>> @@ -671,6 +671,9 @@ void __attribute__((weak)) show_boot_progress (int val);
>>  #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
>>  #define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
>>  
>> +#define ALIGN(x,a)              __ALIGN_MASK(x,(typeof(x))(a)-1)
>> +#define __ALIGN_MASK(x,mask)    (((x)+(mask))&~(mask))
> please fix coding style and use tab instead of space for indent
> 
> #define ALIGN(x, a)		__ALIGN_MASK(x, (typeof(x)) (a) - 1)
> #define __ALIGN_MASK(x, mask)	(((x) + (mask)) & ~(mask))

That's not indenting, that's alignment.  Using tabs after anything that 
is not a tab causes the code to look awful if the tab stops are 
disturbed, such as by viewing with a different tab size, or as part of a 
patch.

-Scott

[U-Boot-Users] [PATCH 1/4] Add ALIGN() macro

[Wolfgang Denk]

In message <4833487F.1010502@freescale.com> you wrote:
>
> > #define ALIGN(x, a)		__ALIGN_MASK(x, (typeof(x)) (a) - 1)
> > #define __ALIGN_MASK(x, mask)	(((x) + (mask)) & ~(mask))
> 
> That's not indenting, that's alignment.  Using tabs after anything that 

OK. Then I will add this requirement to the Coding Style documentation
now.

> is not a tab causes the code to look awful if the tab stops are 
> disturbed, such as by viewing with a different tab size, or as part of a 
> patch.

What do you mean by "a different tab size"? TABs are always 8
characters, always and everywhere.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Death. Destruction. Disease. Horror. That's what war  is  all  about.
That's what makes it a thing to be avoided.
	-- Kirk, "A Taste of Armageddon", stardate 3193.0

[U-Boot-Users] [PATCH 1/4] Add ALIGN() macro

[Wolfgang Denk]

In message <20080520210914.GB18756@game.jcrosoft.org> you wrote:
>
> > +#define ALIGN(x,a)              __ALIGN_MASK(x,(typeof(x))(a)-1)
> > +#define __ALIGN_MASK(x,mask)    (((x)+(mask))&~(mask))
> please fix coding style and use tab instead of space for indent
> 
> #define ALIGN(x, a)		__ALIGN_MASK(x, (typeof(x)) (a) - 1)

Actually that should be

	... __ALIGN_MASK((x), (typeof(x)) (a) - 1)

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
I have a very small mind and must live with it.    -- Edsger Dijkstra