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cpu/msp430: update to modern gcc & newlib

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This commit is contained in:
Kaspar Schleiser 2019-02-22 23:42:08 +01:00
parent bf072bdd55
commit a0aeeb5ff4
2 changed files with 13 additions and 60 deletions
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50
cpu/msp430_common/msp430-main.c
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@ -104,54 +104,16 @@ init_ports(void)
P2IE = 0;
}
/*---------------------------------------------------------------------------*/
/* msp430-ld may align _end incorrectly. Workaround in cpu_init. */
extern int _end; /* Not in sys/unistd.h */
static char *cur_break = (char *) &_end;
void msp430_cpu_init(void)
{
irq_disable();
init_ports();
irq_enable();
periph_init();
if ((uintptr_t)cur_break & 1) { /* Workaround for msp430-ld bug!*/
cur_break++;
}
}
/*---------------------------------------------------------------------------*/
#define asmv(arg) __asm__ __volatile__(arg)
#define STACK_EXTRA 32
/*
* Allocate memory from the heap. Check that we don't collide with the
* stack right now (some other routine might later). A watchdog might
* be used to check if cur_break and the stack pointer meet during
* runtime.
*/
void *sbrk(int incr)
{
char *stack_pointer;
asmv("mov r1, %0" : "=r"(stack_pointer));
stack_pointer -= STACK_EXTRA;
if (incr > (stack_pointer - cur_break)) {
return (void *) - 1; /* ENOMEM */
}
void *old_break = cur_break;
cur_break += incr;
/*
* If the stack was never here then [old_break .. cur_break] should
* be filled with zeros.
*/
return old_break;
}
/*---------------------------------------------------------------------------*/
/*
* Mask all interrupts that can be masked.
@ -178,17 +140,5 @@ splx_(int sr)
asmv("bis %0, r2" : : "r"(sr));
asmv("nop");
}
/*---------------------------------------------------------------------------*/
size_t strnlen(const char *s, size_t maxlen)
{
size_t len;
for (len = 0; len < maxlen; len++, s++) {
if (!*s)
break;
}
return (len);
}
extern void board_init(void);

23
makefiles/arch/msp430.inc.mk
View File

@ -1,21 +1,24 @@
# Target architecture for the build. Use msp430 if you are unsure.
TARGET_ARCH ?= msp430
# Target architecture for the build. Use msp430-elf if you are unsure.
TARGET_ARCH ?= msp430-elf
MSP430_SUPPORT_FILES ?= $(RIOTCPU)/msp430_common/vendor/msp430-gcc-support-files
# define build specific options
CFLAGS_CPU = -mmcu=$(CPU_MODEL)
# default std set to gnu99 of not overwritten by user
ifeq (, $(filter -std=%, $(CFLAGS)))
CFLAGS += -std=gnu99
endif
CFLAGS_CPU = -mmcu=$(CPU_MODEL) -isystem $(MSP430_SUPPORT_FILES)/include
CFLAGS_LINK = -ffunction-sections -fdata-sections
CFLAGS_DBG ?= -gdwarf-2
CFLAGS_DBG ?= -g -gdwarf-2
CFLAGS_OPT ?= -Os
CFLAGS += $(CFLAGS_CPU) $(CFLAGS_LINK) $(CFLAGS_DBG) $(CFLAGS_OPT)
ASFLAGS += $(CFLAGS_CPU) --defsym $(CPU_MODEL)=1 $(CFLAGS_DBG)
# export linker flags
LINKFLAGS += $(CFLAGS_CPU) $(CFLAGS_DBG) $(CFLAGS_OPT) -Wl,--gc-sections -static -lgcc
LINKFLAGS += $(CFLAGS_CPU) $(CFLAGS_DBG) $(CFLAGS_OPT)
LINKFLAGS += -Wl,--gc-sections -Wl,-L$(MSP430_SUPPORT_FILES)/include
OPTIONAL_CFLAGS_BLACKLIST += -fdiagnostics-color
OPTIONAL_CFLAGS_BLACKLIST += -Wformat-overflow
OPTIONAL_CFLAGS_BLACKLIST += -Wformat-truncation
OPTIONAL_CFLAGS_BLACKLIST += -gz
# msp430 uses newlib by default
DEFAULT_MODULE += newlib