Remove CS3-style initialization.

Remove libcs3-related bits from support/ld. Break them out into
libmaple proper and Wirish as appropriate: vector table definition and
ISR declarations go into libmaple proper, and startup code goes into
Wirish. Vector table symbols are included into common.inc from an
STM32 family-specific directory under support/ld/stm32.

This is a combination of 5 commits. Individual commit messages follow:

libcs3_stm32_src: Don't depend on cs3.h.

So we can use the existing toolchain.

Move ISR decls/vector table into libmaple proper.

This allows us to configure the vector table on a per-family basis.

- Move
        support/ld/libcs3_stm32_src/stm32_isrs.S
                                    stm32_vector_table.S
  to
        libmaple/stm32f1/isrs_performance.S
                         vector_table_performance.S,
  respectively.

  The directory libmaple/stm32f1/ is intended to hold all
  STM32F1-specific code within libmaple. Obviously, there's a lot of
  work to do before this becomes true.

- support/ld/libcs3_stm32_src/Makefile: Don't try to compile
  stm32_isrs.S and stm32_vector_table.S anymore.

- Add libmaple/stm32f1/rules.mk to include these new files in the
  standard libmaple build.

- support/make/target-config.mk: Add LIBMAPLE_MODULE_FAMILY, which
  selects a directory to use as a family-specific libmaple
  submodule.

- Makefile: Add LIBMAPLE_MODULE_FAMILY to LIBMAPLE_MODULES.

Remove support/ld/libcs3_stm32_src and derived object files.

From support/ld/libcs3_stm32_src, move start.S and start_c.c into
Wirish. Modify wirish/rules.mk accordingly.

Delete support/ld/libcs3_stm32_*_density.a. These are no longer
necessary, as the relevant objects are included in the standard Wirish
build. Remove the GROUP statements from the board linker scripts
accordingly.

Remove SEARCH_DIR(.) from common.inc; it's no longer necessary. Also
fix up some comments that are now out of date.

wirish/start_c.c: Don't use CS3-style memory initialization.

Switch memory initialization to a simpler style of initializing .data
if necessary, then zeroing .bss. Initializing .data is only necessary
during Flash builds, since during RAM builds, LOADADDR(.data) ==
ADDR(.data).

This makes libmaple completely incompatible with the CS3 startup
sequence. Subsequent commits will clean up the namespace to reflect
that fact.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>

1 files changed, 90 insertions, 0 deletions

diff --git a/libmaple/stm32f1/vector_table_performance.S b/libmaple/stm32f1/vector_table_performance.S
new file mode 100644
index 0000000..7067d95
--- /dev/null
+++ b/libmaple/stm32f1/vector_table_performance.S
@@ -0,0 +1,90 @@
+/* STM32 vector table */
+
+	.section	".stm32.interrupt_vector"
+
+	.globl	__cs3_stm32_vector_table
+	.type	__cs3_stm32_vector_table, %object
+
+__cs3_stm32_vector_table:
+/* CM3 core interrupts */
+	.long	__cs3_stack
+	.long	__cs3_reset
+	.long	__exc_nmi
+	.long	__exc_hardfault
+	.long	__exc_memmanage
+	.long	__exc_busfault
+	.long	__exc_usagefault
+	.long	__stm32reservedexception7
+	.long	__stm32reservedexception8
+	.long	__stm32reservedexception9
+	.long	__stm32reservedexception10
+	.long	__exc_svc
+	.long	__exc_debug_monitor
+	.long	__stm32reservedexception13
+	.long	__exc_pendsv
+	.long	__exc_systick
+/* Peripheral interrupts */
+	.long	__irq_wwdg
+	.long	__irq_pvd
+	.long	__irq_tamper
+	.long	__irq_rtc
+	.long	__irq_flash
+	.long	__irq_rcc
+	.long	__irq_exti0
+	.long	__irq_exti1
+	.long	__irq_exti2
+	.long	__irq_exti3
+	.long	__irq_exti4
+	.long	__irq_dma1_channel1
+	.long	__irq_dma1_channel2
+	.long	__irq_dma1_channel3
+	.long	__irq_dma1_channel4
+	.long	__irq_dma1_channel5
+	.long	__irq_dma1_channel6
+	.long	__irq_dma1_channel7
+	.long	__irq_adc
+	.long	__irq_usb_hp_can_tx
+	.long	__irq_usb_lp_can_rx0
+	.long	__irq_can_rx1
+	.long	__irq_can_sce
+	.long	__irq_exti9_5
+	.long	__irq_tim1_brk
+	.long	__irq_tim1_up
+	.long	__irq_tim1_trg_com
+	.long	__irq_tim1_cc
+	.long	__irq_tim2
+	.long	__irq_tim3
+	.long	__irq_tim4
+	.long	__irq_i2c1_ev
+	.long	__irq_i2c1_er
+	.long	__irq_i2c2_ev
+	.long	__irq_i2c2_er
+	.long	__irq_spi1
+	.long	__irq_spi2
+	.long	__irq_usart1
+	.long	__irq_usart2
+	.long	__irq_usart3
+	.long	__irq_exti15_10
+	.long	__irq_rtcalarm
+	.long	__irq_usbwakeup
+#if defined (STM32_HIGH_DENSITY)
+	.long	__irq_tim8_brk
+	.long	__irq_tim8_up
+	.long	__irq_tim8_trg_com
+	.long	__irq_tim8_cc
+	.long	__irq_adc3
+	.long	__irq_fsmc
+	.long	__irq_sdio
+	.long	__irq_tim5
+	.long	__irq_spi3
+	.long	__irq_uart4
+	.long	__irq_uart5
+	.long	__irq_tim6
+	.long	__irq_tim7
+	.long	__irq_dma2_channel1
+	.long	__irq_dma2_channel2
+	.long	__irq_dma2_channel3
+	.long	__irq_dma2_channel4_5
+#endif /* STM32_HIGH_DENSITY */
+
+	.size	__cs3_stm32_vector_table, . - __cs3_stm32_vector_table