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authorSonic Zhang <sonic.zhang@analog.com>2008-04-24 06:13:37 +0800
committerBryan Wu <cooloney@kernel.org>2008-04-24 06:13:37 +0800
commitb85b82d980526d683dc3b39f2ac1f447fa84a105 (patch)
tree116646f10fc37668b4136aa040136354442eeb54 /arch
parent253bcf4f9b6dde1cfa169bc29655cf177d6a903b (diff)
[Blackfin] arch: fix bug - Section data_l1_cacheline_aligned should be defined in link script of kernel
http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3978 Section data_l1_cacheline_aligned should be defined in link script of kernel, when L1 data sram bank A is not available. In bf536 with all data cache is enabled, there is no L1 data sram. Current link script won't define section data_l1.cacheline_aligned in this case. But, if user select put cacheline_aligned data into l1 sram in kernel menuconfig, these data will be dropped and access to these data will trigger data CPLB exception. Do panic in l1 relocation code as well. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/blackfin/kernel/setup.c6
-rw-r--r--arch/blackfin/kernel/vmlinux.lds.S5
2 files changed, 8 insertions, 3 deletions
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index fafaccb321f..c494495af40 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -107,7 +107,7 @@ void __init bf53x_relocate_l1_mem(void)
l1_code_length = _etext_l1 - _stext_l1;
if (l1_code_length > L1_CODE_LENGTH)
- l1_code_length = L1_CODE_LENGTH;
+ panic("L1 Instruction SRAM Overflow\n");
/* cannot complain as printk is not available as yet.
* But we can continue booting and complain later!
*/
@@ -117,14 +117,14 @@ void __init bf53x_relocate_l1_mem(void)
l1_data_a_length = _ebss_l1 - _sdata_l1;
if (l1_data_a_length > L1_DATA_A_LENGTH)
- l1_data_a_length = L1_DATA_A_LENGTH;
+ panic("L1 Data SRAM Bank A Overflow\n");
/* Copy _sdata_l1 to _ebss_l1 to L1 data bank A SRAM */
dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length);
l1_data_b_length = _ebss_b_l1 - _sdata_b_l1;
if (l1_data_b_length > L1_DATA_B_LENGTH)
- l1_data_b_length = L1_DATA_B_LENGTH;
+ panic("L1 Data SRAM Bank B Overflow\n");
/* Copy _sdata_b_l1 to _ebss_b_l1 to L1 data bank B SRAM */
dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length +
diff --git a/arch/blackfin/kernel/vmlinux.lds.S b/arch/blackfin/kernel/vmlinux.lds.S
index 7a1200328ac..288dfdbfb61 100644
--- a/arch/blackfin/kernel/vmlinux.lds.S
+++ b/arch/blackfin/kernel/vmlinux.lds.S
@@ -83,6 +83,11 @@ SECTIONS
. = ALIGN(32);
*(.data.cacheline_aligned)
+#if !L1_DATA_A_LENGTH
+ . = ALIGN(32);
+ *(.data_l1.cacheline_aligned)
+#endif
+
DATA_DATA
*(.data.*)
CONSTRUCTORS