new file mode 100644
@@ -0,0 +1,32 @@
+/*
+ * arc-specific.h -- provide ARC-specific definitions
+ *
+ * Copyright (c) 2024 Synopsys Inc.
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ *
+ */
+
+#ifndef _ARC_SPECIFIC_H
+#define _ARC_SPECIFIC_H
+
+/* First check for MetaWare compiler as it also defines __GNUC__. */
+#if defined (__CCAC__)
+ #define read_aux_reg(r) _lr(r)
+ #define write_aux_reg(r, v) _sr((unsigned int)(v), r)
+#elif defined (__GNUC__)
+ #define read_aux_reg(r) __builtin_arc_lr(r)
+ #define write_aux_reg(v, r) __builtin_arc_sr((unsigned int)(v), r)
+#else
+ #error "Unexpected compiler"
+#endif
+
+#endif /* _ARC_SPECIFIC_H */
new file mode 100644
@@ -0,0 +1,40 @@
+/*
+ * arc-symbols.h -- provide ARC-specific symbols
+ *
+ * Copyright (c) 2024 Synopsys Inc.
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ *
+ */
+
+#ifndef _ARC_SYMBOLS_H
+#define _ARC_SYMBOLS_H
+
+/* First check for MetaWare compiler as it also defines __GNUC__. */
+#if defined (__CCAC__)
+ #define STACK_TOP _estack
+ #define SMALL_DATA_BASE _SDA_BASE_
+ #define SMALL_DATA_BSS_START _fsbss
+ #define SMALL_DATA_BSS_END _esbss
+ #define START_HEAP _fheap
+ #define END_HEAP _eheap
+#elif defined (__GNUC__)
+ #define STACK_TOP __stack_top
+ #define SMALL_DATA_BASE __SDATA_BEGIN__
+ #define SMALL_DATA_BSS_START __sbss_start
+ #define SMALL_DATA_BSS_END _end
+ #define START_HEAP __start_heap
+ #define END_HEAP __end_heap
+#else
+ #error "Unexpected compiler"
+#endif
+
+#endif /* _ARC_SYMBOLS_H */
\ No newline at end of file
@@ -15,6 +15,8 @@
*
*/
+#include "arc-specific.h"
+
#define ARC_TIM_BUILD 0x75
#define ARC_TIM_BUILD_VER_MASK 0x00FF
#define ARC_TIM_BUILD_TIM0_FL 0x0100
@@ -37,7 +39,7 @@ const unsigned int arc_timer_default = 0;
static int
_arc_timer_present (unsigned int tim)
{
- unsigned int bcr = __builtin_arc_lr (ARC_TIM_BUILD);
+ unsigned int bcr = read_aux_reg (ARC_TIM_BUILD);
unsigned int ver = bcr & ARC_TIM_BUILD_VER_MASK;
if (ver == 0)
@@ -59,9 +61,9 @@ _arc_timer_read (unsigned int tim)
if (_arc_timer_present (tim))
{
if (tim == 0)
- return __builtin_arc_lr (ARC_TIM_COUNT0);
+ return read_aux_reg (ARC_TIM_COUNT0);
else if (tim == 1)
- return __builtin_arc_lr (ARC_TIM_COUNT1);
+ return read_aux_reg (ARC_TIM_COUNT1);
}
return 0;
@@ -95,14 +97,14 @@ _arc_timer_reset (unsigned int tim)
return;
}
- ctrl = __builtin_arc_lr (tim_control);
+ ctrl = read_aux_reg (tim_control);
/* Disable timer interrupt when programming. */
- __builtin_arc_sr (0, tim_control);
+ write_aux_reg (0, tim_control);
/* Default limit is 24-bit, increase it to 32-bit. */
- __builtin_arc_sr (0xFFFFFFFF, tim_limit);
+ write_aux_reg (0xFFFFFFFF, tim_limit);
/* Set NH bit to count only when processor is running. */
- __builtin_arc_sr (ctrl | ARC_TIM_CONTROL_NH_FL, tim_control);
- __builtin_arc_sr (0, tim_count);
+ write_aux_reg (ctrl | ARC_TIM_CONTROL_NH_FL, tim_control);
+ write_aux_reg (0, tim_count);
}
}
@@ -41,6 +41,8 @@
the initialization code.
*/
+#include "arc-symbols.h"
+
/* Compatibility with older ARC GCC, that doesn't provide some of the
preprocessor defines used by newlib and libgloss for ARC. */
#if defined (__Xbarrel_shifter) && !defined (__ARC_BARREL_SHIFTER__)
@@ -106,11 +108,11 @@ IVT_ENTRY(IRQ_20) ; 20 0x50 80
#ifdef __ARC601__
; Startup code for the ARC601 processor
__start:
- mov gp, __SDATA_BEGIN__
- mov sp, __stack_top ; Point to top of stack
+ mov gp, SMALL_DATA_BASE
+ mov sp, STACK_TOP ; Point to top of stack
mov r5, 0 ; Zero value
- mov_s r2, __sbss_start ; r2 = start of the bss section
- sub r3, _end, r2 ; r3 = size of the bss section in bytes
+ mov_s r2, SMALL_DATA_BSS_START ; r2 = start of the bss section
+ sub r3, SMALL_DATA_BSS_START, r2 ; r3 = size of the bss section in bytes
asr_s r3, r3
asr_s r3, r3 ; r3 = size of bss in words
@@ -146,9 +148,9 @@ __start:
;; Initialize jli_base
sr __JLI_TABLE__,[jli_base]
#endif
- mov gp, __SDATA_BEGIN__
- mov_s r2, __sbss_start ; r2 = start of the bss section
- sub r3, _end, r2 ; r3 = size of the bss section in bytes
+ mov gp, SMALL_DATA_BASE
+ mov_s r2, SMALL_DATA_BSS_START ; r2 = start of the bss section
+ sub r3, SMALL_DATA_BSS_END, r2 ; r3 = size of the bss section in bytes
; set up the loop counter register to the size (in words) of the bss section
#if defined (__ARC_BARREL_SHIFTER__)
asr.f lp_count, r3, 2
@@ -162,12 +164,12 @@ __start:
add r3, pcl, 20
sr r3, [2] ; LP_END
; initialize stack pointer, and this instruction has 2 words
- mov sp, __stack_top
+ mov sp, STACK_TOP
mov_s r3, 0
st.ab r3, [r2, 4] ; zero out the word
.Lend_zbss:
#else
- mov sp, __stack_top ; initialize stack pointer
+ mov sp, STACK_TOP ; initialize stack pointer
mov_s r3,0
; loop to zero out the bss. Enter loop only if lp_count != 0
lpnz .Lend_zbss
@@ -15,6 +15,7 @@
*
*/
+#include "arc-specific.h"
#include "uart-8250.h"
/* Setup UART parameters. */
@@ -22,7 +23,7 @@ int
_setup_low_level (void)
{
const uint32_t aux_dmp_per = 0x20a;
- void * const uart_base = (char *)__builtin_arc_lr(aux_dmp_per) + 0x00009000;
+ void * const uart_base = (char *)read_aux_reg(aux_dmp_per) + 0x00009000;
const int uart_aux_mapped = 0;
const uint32_t uart_clock = 50000000;
const uint32_t uart_baud = 115200;
@@ -15,6 +15,7 @@
*
*/
+#include "arc-specific.h"
#include "uart-8250.h"
/* Setup UART parameters. */
@@ -28,7 +29,7 @@ _setup_low_level (void)
const uint32_t uart_baud = 115200;
/* For this platform we have to enable UART clock before configuring it. */
- __builtin_arc_sr (0x01, (uint32_t) uart_base + uart_clk_ena);
+ write_aux_reg (0x01, (uint32_t) uart_base + uart_clk_ena);
_uart_8250_setup (uart_base, uart_aux_mapped, uart_clock, uart_baud);
@@ -30,9 +30,10 @@
#include <sys/types.h>
#include <sys/errno.h>
+#include "arc-symbols.h"
-extern char __start_heap;
-extern char __end_heap;
+extern char START_HEAP;
+extern char END_HEAP;
caddr_t
_sbrk (size_t nbytes)
@@ -42,7 +43,7 @@ _sbrk (size_t nbytes)
if (heap_ptr == NULL)
{
- heap_ptr = &__start_heap;
+ heap_ptr = &START_HEAP;
}
/* Align the 'heap_ptr' so that memory will always be allocated at word
@@ -50,7 +51,7 @@ _sbrk (size_t nbytes)
heap_ptr = (char *) ((((unsigned long) heap_ptr) + 7) & ~7);
prev_heap_ptr = heap_ptr;
- if ((heap_ptr + nbytes) < &__end_heap)
+ if ((heap_ptr + nbytes) < &END_HEAP)
{
heap_ptr += nbytes;
return (caddr_t) prev_heap_ptr;
@@ -20,6 +20,7 @@
#include <stdint.h>
#include <stdio.h>
#include <errno.h>
+#include "arc-specific.h"
/*
* List of UART 8250 registers with offsets:
@@ -144,7 +145,7 @@ _uart_8250_write_reg (const struct _uart_8250 *uart, uint32_t reg,
uint32_t value)
{
if (uart->aux_mapped)
- __builtin_arc_sr (value, (uint32_t) uart->base + reg);
+ write_aux_reg (value, (uint32_t) uart->base + reg);
else
*(volatile uint32_t *)(uart->base + reg) = value;
}
@@ -154,7 +155,7 @@ static inline uint32_t
_uart_8250_read_reg (const struct _uart_8250 *uart, uint32_t reg)
{
if (uart->aux_mapped)
- return __builtin_arc_lr ((uint32_t) uart->base + reg);
+ return read_aux_reg ((uint32_t) uart->base + reg);
else
return *(volatile uint32_t *)(uart->base + reg);
}