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removed BaS copy to RAM.

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Since flashing is intended from a self-contained, SD-card loaded image, this is not neccessary anymore.
This commit is contained in:
Markus Fröschle
2013-07-02 09:53:48 +00:00
parent 3f606545a9
commit 21232c7e09
7 changed files with 332 additions and 339 deletions
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2
BaS_gcc/Makefile
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@@ -144,7 +144,7 @@ $(LIBBAS): $(OBJS)
#$(OBJDIR)/init_fpga.o: CFLAGS += -mbitfield #$(OBJDIR)/init_fpga.o: CFLAGS += -mbitfield
# compile printf pc-relative so it can be used as well before and after copy of BaS # compile printf pc-relative so it can be used as well before and after copy of BaS
$(OBJDIR)/bas_printf.o: CFLAGS += -mpcrel #$(OBJDIR)/bas_printf.o: CFLAGS += -mpcrel
# the same for flush_and_invalidate_cache() # the same for flush_and_invalidate_cache()
$(OBJDIR)/cache.o: CFLAGS += -mpcrel $(OBJDIR)/cache.o: CFLAGS += -mpcrel

38
BaS_gcc/bas.lk.in
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@@ -14,6 +14,25 @@ SECTIONS
objs/init_fpga.o(.text) objs/init_fpga.o(.text)
objs/wait.o(.text) objs/wait.o(.text)
objs/BaS.o(.text)
objs/wait.o(.text)
/* put other routines into the same segment (RAM) as BaS.o */
objs/unicode.o(.text)
objs/mmc.o(.text)
objs/ff.o(.text)
objs/sd_card.o(.text)
objs/s19reader.o(.text)
objs/bas_printf.o(.text)
objs/bas_string.o(.text)
objs/printf_helper.o(.text)
objs/cache.o(.text)
objs/mmu.o(.text)
objs/supervisor.o(.text)
objs/illegal_instruction.o(.text)
objs/exceptions.o(.text)
objs/xhdi_sd.o(.text)
objs/xhdi_interface.o(text)
objs/xhdi_vec.o(text)
#if (FORMAT == elf32-m68k) #if (FORMAT == elf32-m68k)
*(.rodata) *(.rodata)
*(.rodata.*) *(.rodata.*)
@@ -28,25 +47,6 @@ SECTIONS
*/ */
AT (ALIGN(ADDR(.text) + SIZEOF(.text), 4)) AT (ALIGN(ADDR(.text) + SIZEOF(.text), 4))
{ {
objs/BaS.o(.text)
objs/wait.o(.text)
/* put other routines into the same segment (RAM) as BaS.o */
objs/unicode.o(.text)
objs/mmc.o(.text)
objs/ff.o(.text)
objs/sd_card.o(.text)
objs/s19reader.o(.text)
objs/bas_printf.o(.text)
objs/bas_string.o(.text)
objs/printf_helper.o(.text)
objs/cache.o(.text)
objs/mmu.o(.text)
objs/exceptions.o(.text)
objs/supervisor.o(.text)
objs/illegal_instruction.o(.text)
objs/xhdi_sd.o(.text)
objs/xhdi_interface.o(text)
objs/xhdi_vec.o(text)
*(.data) *(.data)
*(.bss) *(.bss)

4
BaS_gcc/basflash.lk.in
View File

@@ -21,8 +21,8 @@ SECTIONS
} }
#define BAS_LABEL_LMA(x) ((x)) #define BAS_LABEL_LMA(x) ((x))
_xprintf_before_copy = BAS_LABEL_LMA(_xprintf); /* _xprintf_before_copy = BAS_LABEL_LMA(_xprintf); */
_display_progress_before_copy = BAS_LABEL_LMA(_display_progress); /* _display_progress_before_copy = BAS_LABEL_LMA(_display_progress); */
/* _flush_and_invalidate_caches_before_copy = BAS_LABEL_LMA(_flush_and_invalidate_caches); */ /* _flush_and_invalidate_caches_before_copy = BAS_LABEL_LMA(_flush_and_invalidate_caches); */
/* /*

616
BaS_gcc/sources/BaS.c
View File

@@ -1,309 +1,309 @@
/* /*
* BaS * BaS
* *
* This file is part of BaS_gcc. * This file is part of BaS_gcc.
* *
* BaS_gcc is free software: you can redistribute it and/or modify * BaS_gcc is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by * it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or * the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version. * (at your option) any later version.
* *
* BaS_gcc is distributed in the hope that it will be useful, * BaS_gcc is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of * but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details. * GNU General Public License for more details.
* *
* You should have received a copy of the GNU General Public License * You should have received a copy of the GNU General Public License
* along with BaS_gcc. If not, see <http://www.gnu.org/licenses/>. * along with BaS_gcc. If not, see <http://www.gnu.org/licenses/>.
* *
* Copyright 2010 - 2012 F. Aschwanden * Copyright 2010 - 2012 F. Aschwanden
* Copyright 2011 - 2012 V. Riviere * Copyright 2011 - 2012 V. Riviere
* Copyright 2012 M. Froeschle * Copyright 2012 M. Froeschle
*/ */
#include <stdint.h> #include <stdint.h>
#include <stdbool.h> #include <stdbool.h>
#include "MCF5475.h" #include "MCF5475.h"
#include "MCF5475_SLT.h" #include "MCF5475_SLT.h"
#include "startcf.h" #include "startcf.h"
#include "cache.h" #include "cache.h"
#include "bas_printf.h" #include "bas_printf.h"
#include "bas_types.h" #include "bas_types.h"
#include "sd_card.h" #include "sd_card.h"
#include "wait.h" #include "wait.h"
#include "diskio.h" #include "diskio.h"
#include "ff.h" #include "ff.h"
#include "s19reader.h" #include "s19reader.h"
/* imported routines */ /* imported routines */
extern int mmu_init(); extern int mmu_init();
extern int vec_init(); extern int vec_init();
/* Symbols from the linker script */ /* Symbols from the linker script */
extern uint8_t _STRAM_END[]; extern uint8_t _STRAM_END[];
#define STRAM_END ((uint32_t)_STRAM_END) #define STRAM_END ((uint32_t)_STRAM_END)
extern uint8_t _TOS[]; extern uint8_t _TOS[];
#define TOS ((uint32_t)_TOS) /* final TOS location */ #define TOS ((uint32_t)_TOS) /* final TOS location */
extern uint8_t _FASTRAM_END[]; extern uint8_t _FASTRAM_END[];
#define FASTRAM_END ((uint32_t)_FASTRAM_END) #define FASTRAM_END ((uint32_t)_FASTRAM_END)
extern uint8_t _EMUTOS[]; extern uint8_t _EMUTOS[];
#define EMUTOS ((uint32_t)_EMUTOS) /* where EmuTOS is stored in flash */ #define EMUTOS ((uint32_t)_EMUTOS) /* where EmuTOS is stored in flash */
extern uint8_t _EMUTOS_SIZE[]; extern uint8_t _EMUTOS_SIZE[];
#define EMUTOS_SIZE ((uint32_t)_EMUTOS_SIZE) /* size of EmuTOS, in bytes */ #define EMUTOS_SIZE ((uint32_t)_EMUTOS_SIZE) /* size of EmuTOS, in bytes */
/* /*
* check if it is possible to transfer data to PIC * check if it is possible to transfer data to PIC
*/ */
static inline bool pic_txready(void) static inline bool pic_txready(void)
{ {
if (MCF_PSC3_PSCSR & MCF_PSC_PSCSR_TXRDY) if (MCF_PSC3_PSCSR & MCF_PSC_PSCSR_TXRDY)
return true; return true;
return true; return true;
} }
/* /*
* check if it is possible to receive data from PIC * check if it is possible to receive data from PIC
*/ */
static inline bool pic_rxready(void) static inline bool pic_rxready(void)
{ {
if (MCF_PSC3_PSCSR & MCF_PSC_PSCSR_RXRDY) if (MCF_PSC3_PSCSR & MCF_PSC_PSCSR_RXRDY)
return true; return true;
return false; return false;
} }
void write_pic_byte(uint8_t value) void write_pic_byte(uint8_t value)
{ {
/* Wait until the transmitter is ready or 1000us are passed */ /* Wait until the transmitter is ready or 1000us are passed */
waitfor(1000, pic_txready); waitfor(1000, pic_txready);
/* Transmit the byte */ /* Transmit the byte */
*(volatile uint8_t*)(&MCF_PSC3_PSCTB_8BIT) = value; // Really 8-bit *(volatile uint8_t*)(&MCF_PSC3_PSCTB_8BIT) = value; // Really 8-bit
} }
uint8_t read_pic_byte(void) uint8_t read_pic_byte(void)
{ {
/* Wait until a byte has been received or 1000us are passed */ /* Wait until a byte has been received or 1000us are passed */
waitfor(1000, pic_rxready); waitfor(1000, pic_rxready);
/* Return the received byte */ /* Return the received byte */
return *(volatile uint8_t*)(&MCF_PSC3_PSCTB_8BIT); // Really 8-bit return *(volatile uint8_t*)(&MCF_PSC3_PSCTB_8BIT); // Really 8-bit
} }
void pic_init(void) void pic_init(void)
{ {
char answer[4] = "OLD"; char answer[4] = "OLD";
xprintf("initialize the PIC: "); xprintf("initialize the PIC: ");
/* Send the PIC initialization string */ /* Send the PIC initialization string */
write_pic_byte('A'); write_pic_byte('A');
write_pic_byte('C'); write_pic_byte('C');
write_pic_byte('P'); write_pic_byte('P');
write_pic_byte('F'); write_pic_byte('F');
/* Read the 3-char answer string. Should be "OK!". */ /* Read the 3-char answer string. Should be "OK!". */
answer[0] = read_pic_byte(); answer[0] = read_pic_byte();
answer[1] = read_pic_byte(); answer[1] = read_pic_byte();
answer[2] = read_pic_byte(); answer[2] = read_pic_byte();
answer[3] = '\0'; answer[3] = '\0';
if (answer[0] != 'O' || answer[1] != 'K' || answer[2] != '!') if (answer[0] != 'O' || answer[1] != 'K' || answer[2] != '!')
{ {
xprintf("PIC initialization failed. Already initialized?\r\n"); xprintf("PIC initialization failed. Already initialized?\r\n");
} }
else else
{ {
xprintf("%s\r\n", answer); xprintf("%s\r\n", answer);
} }
} }
void nvram_init(void) void nvram_init(void)
{ {
int i; int i;
xprintf("Restore the NVRAM data: "); xprintf("Restore the NVRAM data: ");
/* Request for NVRAM backup data */ /* Request for NVRAM backup data */
write_pic_byte(0x01); write_pic_byte(0x01);
/* Check answer type */ /* Check answer type */
if (read_pic_byte() != 0x81) if (read_pic_byte() != 0x81)
{ {
// FIXME: PIC protocol error // FIXME: PIC protocol error
xprintf("FAILED\r\n"); xprintf("FAILED\r\n");
return; return;
} }
/* Restore the NVRAM backup to the FPGA */ /* Restore the NVRAM backup to the FPGA */
for (i = 0; i < 64; i++) for (i = 0; i < 64; i++)
{ {
uint8_t data = read_pic_byte(); uint8_t data = read_pic_byte();
*(volatile uint8_t*)0xffff8961 = i; *(volatile uint8_t*)0xffff8961 = i;
*(volatile uint8_t*)0xffff8963 = data; *(volatile uint8_t*)0xffff8963 = data;
} }
xprintf("finished\r\n"); xprintf("finished\r\n");
} }
void enable_coldfire_interrupts() void enable_coldfire_interrupts()
{ {
xprintf("enable interrupts: "); xprintf("enable interrupts: ");
* (volatile uint32_t *) 0xf0010004 = 0L; /* disable all interrupts */ * (volatile uint32_t *) 0xf0010004 = 0L; /* disable all interrupts */
MCF_EPORT_EPPAR = 0xaaa8; /* all interrupts on falling edge */ MCF_EPORT_EPPAR = 0xaaa8; /* all interrupts on falling edge */
MCF_GPT0_GMS = MCF_GPT_GMS_ICT(1) | /* timer 0 on, video change capture on rising edge */ MCF_GPT0_GMS = MCF_GPT_GMS_ICT(1) | /* timer 0 on, video change capture on rising edge */
MCF_GPT_GMS_IEN | MCF_GPT_GMS_IEN |
MCF_GPT_GMS_TMS(1); MCF_GPT_GMS_TMS(1);
MCF_INTC_ICR62 = 0x3f; MCF_INTC_ICR62 = 0x3f;
* (volatile uint8_t *) 0xf0010004 = 0xfe; /* enable int 1-7 */ * (volatile uint8_t *) 0xf0010004 = 0xfe; /* enable int 1-7 */
MCF_EPORT_EPIER = 0xfe; /* int 1-7 on */ MCF_EPORT_EPIER = 0xfe; /* int 1-7 on */
MCF_EPORT_EPFR = 0xff; /* clear all pending interrupts */ MCF_EPORT_EPFR = 0xff; /* clear all pending interrupts */
MCF_INTC_IMRL = 0xffffff00; /* int 1-7 on */ MCF_INTC_IMRL = 0xffffff00; /* int 1-7 on */
MCF_INTC_IMRH = 0xbffffffe; /* psc3 and timer 0 int on */ MCF_INTC_IMRH = 0xbffffffe; /* psc3 and timer 0 int on */
xprintf("finished\r\n"); xprintf("finished\r\n");
} }
void disable_coldfire_interrupts() void disable_coldfire_interrupts()
{ {
* (volatile uint32_t *) 0xf0010004 = 0L; /* disable all interrupts */ * (volatile uint32_t *) 0xf0010004 = 0L; /* disable all interrupts */
} }
void BaS(void) void BaS(void)
{ {
uint8_t *src; uint8_t *src;
uint8_t *dst = (uint8_t *)TOS; uint8_t *dst = (uint8_t *)TOS;
uint32_t *adr; uint32_t *adr;
pic_init(); pic_init();
nvram_init(); nvram_init();
xprintf("copy EmuTOS: "); xprintf("copy EmuTOS: ");
/* copy EMUTOS */ /* copy EMUTOS */
src = (uint8_t *) EMUTOS; src = (uint8_t *) EMUTOS;
while (src < (uint8_t *)(EMUTOS + EMUTOS_SIZE)) while (src < (uint8_t *)(EMUTOS + EMUTOS_SIZE))
{ {
*dst++ = *src++; *dst++ = *src++;
} }
xprintf("finished\r\n"); xprintf("finished\r\n");
/* we have copied a code area, so flush the caches */ /* we have copied a code area, so flush the caches */
flush_and_invalidate_caches(); flush_and_invalidate_caches();
xprintf("initialize MMU: "); xprintf("initialize MMU: ");
mmu_init(); mmu_init();
xprintf("finished\r\n"); xprintf("finished\r\n");
xprintf("initialize exception vector table: "); xprintf("initialize exception vector table: ");
vec_init(); vec_init();
xprintf("finished\r\n"); xprintf("finished\r\n");
MCF_MMU_MMUCR = MCF_MMU_MMUCR_EN; /* MMU on */ MCF_MMU_MMUCR = MCF_MMU_MMUCR_EN; /* MMU on */
xprintf("IDE reset: "); xprintf("IDE reset: ");
/* IDE reset */ /* IDE reset */
* (volatile uint8_t *) (0xffff8802 - 2) = 14; * (volatile uint8_t *) (0xffff8802 - 2) = 14;
* (volatile uint8_t *) (0xffff8802 - 0) = 0x80; * (volatile uint8_t *) (0xffff8802 - 0) = 0x80;
wait(1); wait(1);
* (volatile uint8_t *) (0xffff8802 - 0) = 0; * (volatile uint8_t *) (0xffff8802 - 0) = 0;
xprintf("finished\r\n"); xprintf("finished\r\n");
xprintf("enable video: "); xprintf("enable video: ");
/* /*
* video setup (25MHz) * video setup (25MHz)
*/ */
* (volatile uint32_t *) (0xf0000410 + 0) = 0x032002ba; /* horizontal 640x480 */ * (volatile uint32_t *) (0xf0000410 + 0) = 0x032002ba; /* horizontal 640x480 */
* (volatile uint32_t *) (0xf0000410 + 4) = 0x020c020a; /* vertical 640x480 */ * (volatile uint32_t *) (0xf0000410 + 4) = 0x020c020a; /* vertical 640x480 */
* (volatile uint32_t *) (0xf0000410 + 8) = 0x0190015d; /* horizontal 320x240 */ * (volatile uint32_t *) (0xf0000410 + 8) = 0x0190015d; /* horizontal 320x240 */
* (volatile uint32_t *) (0xf0000410 + 12) = 0x020C020A; /* vertical 320x230 */ * (volatile uint32_t *) (0xf0000410 + 12) = 0x020C020A; /* vertical 320x230 */
#ifdef _NOT_USED_ #ifdef _NOT_USED_
// 32MHz // 32MHz
move.l #0x037002ba,(a0)+ // horizontal 640x480 move.l #0x037002ba,(a0)+ // horizontal 640x480
move.l #0x020d020a,(a0)+ // vertikal 640x480 move.l #0x020d020a,(a0)+ // vertikal 640x480
move.l #0x02A001e0,(a0)+ // horizontal 320x240 move.l #0x02A001e0,(a0)+ // horizontal 320x240
move.l #0x05a00160,(a0)+ // vertikal 320x240 move.l #0x05a00160,(a0)+ // vertikal 320x240
#endif /* _NOT_USED_ */ #endif /* _NOT_USED_ */
/* fifo on, refresh on, ddrcs and cke on, video dac on */ /* fifo on, refresh on, ddrcs and cke on, video dac on */
* (volatile uint32_t *) (0xf0000410 - 0x20) = 0x01070002; * (volatile uint32_t *) (0xf0000410 - 0x20) = 0x01070002;
xprintf("finished\r\n"); xprintf("finished\r\n");
sd_card_init(); sd_card_init();
/* /*
* memory setup * memory setup
*/ */
for (adr = (uint32_t *) 0x400L; adr < (uint32_t *) 0x800L; ) { for (adr = (uint32_t *) 0x400L; adr < (uint32_t *) 0x800L; ) {
*adr++ = 0x0L; *adr++ = 0x0L;
*adr++ = 0x0L; *adr++ = 0x0L;
*adr++ = 0x0L; *adr++ = 0x0L;
*adr++ = 0x0L; *adr++ = 0x0L;
} }
* (volatile uint8_t *) 0xffff8007 = 0x48; /* FIXME: what's that ? */ * (volatile uint8_t *) 0xffff8007 = 0x48; /* FIXME: what's that ? */
/* ST RAM */ /* ST RAM */
* (uint32_t *) 0x42e = STRAM_END; /* phystop TOS system variable */ * (uint32_t *) 0x42e = STRAM_END; /* phystop TOS system variable */
* (uint32_t *) 0x420 = 0x752019f3; /* memvalid TOS system variable */ * (uint32_t *) 0x420 = 0x752019f3; /* memvalid TOS system variable */
* (uint32_t *) 0x43a = 0x237698aa; /* memval2 TOS system variable */ * (uint32_t *) 0x43a = 0x237698aa; /* memval2 TOS system variable */
* (uint32_t *) 0x51a = 0x5555aaaa; /* memval3 TOS system variable */ * (uint32_t *) 0x51a = 0x5555aaaa; /* memval3 TOS system variable */
/* TT-RAM */ /* TT-RAM */
* (uint32_t *) 0x5a4 = FASTRAM_END; /* ramtop TOS system variable */ * (uint32_t *) 0x5a4 = FASTRAM_END; /* ramtop TOS system variable */
* (uint32_t *) 0x5a8 = 0x1357bd13; /* ramvalid TOS system variable */ * (uint32_t *) 0x5a8 = 0x1357bd13; /* ramvalid TOS system variable */
#define NOP() __asm__ __volatile__("nop\n\t" : : : "memory") #define NOP() __asm__ __volatile__("nop\n\t" : : : "memory")
xprintf("init ACIA: "); xprintf("init ACIA: ");
/* init ACIA */ /* init ACIA */
* (uint8_t *) 0xfffffc00 = 3; * (uint8_t *) 0xfffffc00 = 3;
NOP(); NOP();
* (uint8_t *) 0xfffffc04 = 3; * (uint8_t *) 0xfffffc04 = 3;
NOP(); NOP();
* (uint8_t *) 0xfffffc00 = 0x96; * (uint8_t *) 0xfffffc00 = 0x96;
NOP(); NOP();
* (uint8_t *) 0xfffffa0f = -1; * (uint8_t *) 0xfffffa0f = -1;
NOP(); NOP();
* (uint8_t *) 0xfffffa11 = -1; * (uint8_t *) 0xfffffa11 = -1;
NOP(); NOP();
xprintf("finished\r\n"); xprintf("finished\r\n");
/* Test for pseudo-supervisor mode: DIP switch #6 down */ /* Test for pseudo-supervisor mode: DIP switch #6 down */
if (DIP_SWITCH & (1 << 7)) { if (DIP_SWITCH & (1 << 7)) {
/* In this mode, the OS actually runs in user mode /* In this mode, the OS actually runs in user mode
* and all the supervisor instructions are emulated. */ * and all the supervisor instructions are emulated. */
__asm__ __volatile__("move.w #0x0700,sr \n\t" : : : "memory"); __asm__ __volatile__("move.w #0x0700,sr \n\t" : : : "memory");
} }
srec_execute("BASFLASH.S19"); srec_execute("BASFLASH.S19");
/* Jump into the OS */ /* Jump into the OS */
typedef void void_func(void); typedef void void_func(void);
typedef struct { typedef struct {
void *initial_sp; void *initial_sp;
void_func *initial_pc; void_func *initial_pc;
} ROM_HEADER; } ROM_HEADER;
xprintf("Call OS. BaS initialization finished...\r\n"); xprintf("Call OS. BaS initialization finished...\r\n");
enable_coldfire_interrupts(); enable_coldfire_interrupts();
ROM_HEADER* os_header = (ROM_HEADER*)TOS; ROM_HEADER* os_header = (ROM_HEADER*)TOS;
os_header->initial_pc(); os_header->initial_pc();
} }

3
BaS_gcc/sources/init_fpga.c
View File

@@ -31,10 +31,7 @@
#define FPGA_DATA0 (1 << 3) #define FPGA_DATA0 (1 << 3)
#define FPGA_CONF_DONE (1 << 5) #define FPGA_CONF_DONE (1 << 5)
extern void xprintf_before_copy(const char *fmt, ...);
#define xprintf xprintf_before_copy
#define display_progress display_progress_before_copy
/* /*
* load FPGA * load FPGA
*/ */

1
BaS_gcc/sources/s19reader.c
View File

@@ -25,7 +25,6 @@
#include <stdint.h> #include <stdint.h>
#include <stdbool.h> #include <stdbool.h>
#include <stdlib.h>
#include "bas_printf.h" #include "bas_printf.h"
#include "sd_card.h" #include "sd_card.h"

7
BaS_gcc/sources/sysinit.c
View File

@@ -33,11 +33,6 @@
#include "bas_types.h" #include "bas_types.h"
#include "wait.h" #include "wait.h"
extern void xprintf_before_copy(const char *fmt, ...);
#define xprintf xprintf_before_copy
extern void flush_and_invalidate_caches_before_copy(void);
#define flush_and_invalidate_caches flush_and_invalidate_caches_before_copy
#define UNUSED(x) (void)(x) /* Unused variable */ #define UNUSED(x) (void)(x) /* Unused variable */
extern volatile long _VRAM; /* start address of video ram from linker script */ extern volatile long _VRAM; /* start address of video ram from linker script */
@@ -852,6 +847,7 @@ void initialize_hardware(void) {
//video_1280_1024(); //video_1280_1024();
init_ac97(); init_ac97();
#ifdef _NOT_USED_
/* copy the BaS code contained in flash to its final location */ /* copy the BaS code contained in flash to its final location */
src = (uint32_t *)BAS_LMA; src = (uint32_t *)BAS_LMA;
end = (uint32_t *)(BAS_LMA + BAS_SIZE); end = (uint32_t *)(BAS_LMA + BAS_SIZE);
@@ -872,6 +868,7 @@ void initialize_hardware(void) {
flush_and_invalidate_caches(); flush_and_invalidate_caches();
/* jump into the BaS in RAM */ /* jump into the BaS in RAM */
#endif /* _NOT_USED_ */
extern void BaS(void); extern void BaS(void);
BaS(); BaS();
} }