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[ion] N0200: improve code spliting between internal/external flash

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Part II: split standby in two methods: one executed from the external
flash, one executed from the internal flash. This avoids to force many
functions to be linked in the internal flash.
This commit is contained in:
Émilie Feral
2019-04-30 12:09:38 +02:00
parent 1c3c170aaa
commit ea104cff9f
2 changed files with 22 additions and 8 deletions
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19
ion/src/device/n0200/drivers/power.cpp
View File

@@ -1,17 +1,28 @@
#include <drivers/power.h>
#include <drivers/board.h>
#include <drivers/external_flash.h>
#include <drivers/reset.h>
namespace Ion {
namespace Power {
void __attribute__((noinline)) standby() {
Device::Power::waitUntilOnOffKeyReleased();
Device::Power::standbyConfiguration();
Device::Board::shutdown();
/* We isolate the standby code that needs to be executed from the internal
* flash (because the external flash is then shut down). We forbid inlining to
* avoid inlining these instructions in the external flash. */
void __attribute__((noinline)) internal_flash_standby() {
Device::ExternalFlash::shutdown();
Device::Board::shutdownClocks();
Device::Power::enterLowPowerMode();
Device::Reset::core();
}
void standby() {
Device::Power::waitUntilOnOffKeyReleased();
Device::Power::standbyConfiguration();
Device::Board::shutdownPeripherals();
internal_flash_standby();
}
}
}

11
ion/src/device/n0200/flash.ld
View File

@@ -61,6 +61,7 @@ SECTIONS {
* done with -fdata-sections -ffunction-sections */
.text.internal : {
. = ALIGN(4);
*(.text.start)
*(.text.abort)
*(.text.isr_systick)
*(.text.__assert)
@@ -73,8 +74,7 @@ SECTIONS {
*(.text.strcmp)
*(.text.memmove)
*/
/* 'start' dependecies */
*(.text.start)
/* 'start' dependencies */
*(.text._ZN3Ion6Device5Board4initEv)
*(.text._ZN3Ion6Device5Board7initFPUEv)
*(.text._ZN3Ion6Device5Board7initMPUEv)
@@ -86,10 +86,13 @@ SECTIONS {
*(.text._ZN3Ion6Device5Cache*)
*(.text._ZN3Ion6Timing6usleepEj)
/* 'abort' dependcies */
/* 'abort' dependencies */
*(.text._ZN3Ion6Device5Reset4coreEv)
/**(.text._ZN3Ion5Power7suspendEb)*/
/* 'standby' dependencies '*/
*(.text._ZN3Ion5Power22internal_flash_standbyEv)
*(.text._ZN3Ion6Device5Power17enterLowPowerModeEv)
*(.text._ZN3Ion6Device5Board14shutdownClocksEb)
/* Optimization */
*/libgcc.a:(.text)