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bsp: fomu: update

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Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross 2019-10-14 11:30:05 +08:00
parent 470d827f13
commit ef07427e06
3 changed files with 98 additions and 54 deletions
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8
hw/bsp/fomu/bsp.c
View File

@ -116,9 +116,11 @@ int board_uart_read(uint8_t* buf, int len)
int board_uart_write(void const * buf, int len)
{
(void) buf;
(void) len;
return 0;
int32_t offset = 0;
for (offset = 0; offset < len; offset++)
if (! (messible_status_read() & CSR_MESSIBLE_STATUS_FULL_OFFSET))
messible_in_write(((uint8_t *)buf)[offset]);
return len;
}
#if CFG_TUSB_OS == OPT_OS_NONE

14
hw/bsp/fomu/crt0-vexriscv.S
View File

@ -57,13 +57,13 @@ trap_entry:
crt_init:
la sp, _fstack + 4
la sp, _estack - 4
la a0, trap_entry
csrw mtvec, a0
bss_init:
la a0, _fbss
la a1, _ebss
la a0, _sbss
la a1, _ebss + 4
bss_loop:
beq a0,a1,bss_done
sw zero,0(a0)
@ -72,13 +72,13 @@ bss_loop:
bss_done:
/* Load DATA */
la t0, _erodata
la t1, _fdata
la t2, _edata
la t0, _etext
la t1, _srelocate
la t2, _erelocate + 4
3:
lw t3, 0(t0)
sw t3, 0(t1)
/* _edata is aligned to 16 bytes. Use word-xfers. */
/* _edata is aligned to 4 bytes. Use word-xfers. */
addi t0, t0, 4
addi t1, t1, 4
bltu t1, t2, 3b

110
hw/bsp/fomu/fomu.ld
View File

@ -6,57 +6,99 @@ __DYNAMIC = 0;
MEMORY {
csr : ORIGIN = 0x60000000, LENGTH = 0x01000000
vexriscv_debug : ORIGIN = 0xf00f0000, LENGTH = 0x00000100
sram : ORIGIN = 0x10000000, LENGTH = 0x00020000
ram : ORIGIN = 0x10000000, LENGTH = 0x00020000
rom : ORIGIN = 0x2001a000, LENGTH = 0x00200000 - 0x1a000
}
/* The stack size used by the application. NOTE: you need to adjust according to your application. */
STACK_SIZE = DEFINED(STACK_SIZE) ? STACK_SIZE : DEFINED(__stack_size__) ? __stack_size__ : 0x2000;
/* Section Definitions */
SECTIONS
{
.text :
{
. = ALIGN(4);
_ftext = .;
*(.text.start)
*(.text .stub .text.* .gnu.linkonce.t.*)
_etext = .;
*(.text .text.* .gnu.linkonce.t.*)
*(.glue_7t) *(.glue_7)
*(.rodata .rodata* .gnu.linkonce.r.*)
/* Support C constructors, and C destructors in both user code
and the C library. This also provides support for C++ code. */
. = ALIGN(4);
KEEP(*(.init))
. = ALIGN(4);
__preinit_array_start = .;
KEEP (*(.preinit_array))
__preinit_array_end = .;
. = ALIGN(4);
__init_array_start = .;
KEEP (*(SORT(.init_array.*)))
KEEP (*(.init_array))
__init_array_end = .;
. = ALIGN(4);
KEEP (*crtbegin.o(.ctors))
KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
KEEP (*(SORT(.ctors.*)))
KEEP (*crtend.o(.ctors))
. = ALIGN(4);
KEEP(*(.fini))
. = ALIGN(4);
__fini_array_start = .;
KEEP (*(.fini_array))
KEEP (*(SORT(.fini_array.*)))
__fini_array_end = .;
KEEP (*crtbegin.o(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
KEEP (*(SORT(.dtors.*)))
KEEP (*crtend.o(.dtors))
} > rom
.rodata :
{
. = ALIGN(4);
_frodata = .;
*(.rodata .rodata.* .gnu.linkonce.r.*)
*(.rodata1)
*(.srodata)
. = ALIGN(4);
_erodata = .;
} > rom
_etext = .; /* End of text section */
.data : AT (ADDR(.rodata) + SIZEOF (.rodata))
.relocate : AT (_etext)
{
. = ALIGN(4);
_fdata = .;
*(.data .data.* .gnu.linkonce.d.*)
*(.data1)
_gp = ALIGN(16);
*(.sdata .sdata.* .gnu.linkonce.s.* .sdata2 .sdata2.*)
. = ALIGN(16);
_edata = .; /* Make sure _edata is >= _gp. */
} > sram
_srelocate = .;
*(.ramfunc .ramfunc.*);
*(.data .data.*);
. = ALIGN(4);
_erelocate = .;
} > ram
.bss :
/* .bss section which is used for uninitialized data */
.bss (NOLOAD) :
{
_fbss = .;
*(.dynsbss)
*(.sbss .sbss.* .gnu.linkonce.sb.*)
*(.scommon)
*(.dynbss)
*(.bss .bss.* .gnu.linkonce.b.*)
. = ALIGN(4);
_sbss = . ;
_szero = .;
*(.bss .bss.*)
*(.sbss .sbss.*)
*(COMMON)
. = ALIGN(4);
_ebss = .;
_end = .;
PROVIDE(end = .);
} > sram
}
_ebss = . ;
_ezero = .;
end = .;
} > ram
PROVIDE(_fstack = ORIGIN(sram) + LENGTH(sram) - 4);
/* stack section */
.stack (NOLOAD):
{
. = ALIGN(8);
_sstack = .;
. = . + STACK_SIZE;
. = ALIGN(8);
_estack = .;
} > ram
. = ALIGN(4);
_end = . ;
}