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lib: Update samd21 code with local changes 

A minor change is necessary to work with GCC's -flto and to work with
common bootloaders.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2018-07-27 19:21:02 -04:00
parent 5633e6c249
commit 71db5fbe31
4 changed files with 31 additions and 3 deletions
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4
lib/README
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@ -21,7 +21,9 @@ compile with gcc's LTO feature. See sam3x.patch for the modifications.
The samd21 directory contains code from the The samd21 directory contains code from the
Atmel.SAMD21_DFP.1.3.304.atpack zip file found at: Atmel.SAMD21_DFP.1.3.304.atpack zip file found at:
http://packs.download.atmel.com/ http://packs.download.atmel.com/
version 1.3.304 (extracted on 20180725). version 1.3.304 (extracted on 20180725). It has been modified to
compile with gcc's LTO feature and to work with chips that have a
bootloader. See samd21.patch for the modifications.
The lpc176x directory contains code from the mbed project: The lpc176x directory contains code from the mbed project:
https://github.com/ARMmbed/mbed-os https://github.com/ARMmbed/mbed-os

26
lib/samd21/samd21.patch Normal file
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@ -0,0 +1,26 @@
diff --git a/lib/samd21/samd21a/gcc/gcc/samd21g18a_flash.ld b/lib/samd21/samd21a/gcc/gcc/samd21g18a_flash.ld
index c6f289e7..34dfb6ba 100644
--- a/lib/samd21/samd21a/gcc/gcc/samd21g18a_flash.ld
+++ b/lib/samd21/samd21a/gcc/gcc/samd21g18a_flash.ld
@@ -35,7 +35,7 @@ SEARCH_DIR(.)
/* Memory Spaces Definitions */
MEMORY
{
- rom (rx) : ORIGIN = 0x00000000, LENGTH = 0x00040000
+ rom (rx) : ORIGIN = 0x00000000 + FLASH_START , LENGTH = 0x00040000 - FLASH_START
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00008000
}
diff --git a/lib/samd21/samd21a/gcc/gcc/startup_samd21.c b/lib/samd21/samd21a/gcc/gcc/startup_samd21.c
index 3dce0edd..a480077f 100644
--- a/lib/samd21/samd21a/gcc/gcc/startup_samd21.c
+++ b/lib/samd21/samd21a/gcc/gcc/startup_samd21.c
@@ -105,7 +105,7 @@ void PTC_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler
void I2S_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
/* Exception Table */
-__attribute__ ((section(".vectors")))
+__attribute__ ((section(".vectors"))) __attribute__((externally_visible))
const DeviceVectors exception_table = {
/* Configure Initial Stack Pointer, using linker-generated symbols */

2
lib/samd21/samd21a/gcc/gcc/samd21g18a_flash.ld
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@ -35,7 +35,7 @@ SEARCH_DIR(.)
/* Memory Spaces Definitions */ /* Memory Spaces Definitions */
MEMORY MEMORY
{ {
rom (rx) : ORIGIN = 0x00000000, LENGTH = 0x00040000 rom (rx) : ORIGIN = 0x00000000 + FLASH_START , LENGTH = 0x00040000 - FLASH_START
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00008000 ram (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00008000
} }

2
lib/samd21/samd21a/gcc/gcc/startup_samd21.c
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@ -105,7 +105,7 @@ void PTC_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler
void I2S_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler"))); void I2S_Handler ( void ) __attribute__ ((weak, alias("Dummy_Handler")));
/* Exception Table */ /* Exception Table */
__attribute__ ((section(".vectors"))) __attribute__ ((section(".vectors"))) __attribute__((externally_visible))
const DeviceVectors exception_table = { const DeviceVectors exception_table = {
/* Configure Initial Stack Pointer, using linker-generated symbols */ /* Configure Initial Stack Pointer, using linker-generated symbols */