blob: 25ba92190450b36e5ec4979712e703931be72ea0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/***************************************************************************
* Copyright (c) 2026 Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* AI Disclosure: This file was largely AI-generated by Claude Code (Opus 5.5).
* The AI-generated portions may be considered public domain (CC0-1.0)
* and not subject to the project's licence. The human contributor has
* reviewed and verified that the code is correct.
*
* SPDX-License-Identifier: MIT and CC0-1.0
**************************************************************************/
/* Erbium memory layout.
*
* Address Size Usage
* ───────────── ──────── ──────────────────────────────────────
* 0x0200_0000 4 KiB System registers (SystemConfig at +0x08)
* 0x0200_4000 4 KiB UART0
* 0x4000_0000 512 B MRAM, reserved for the boot flow
* 0x4000_0200 ~16 MiB MRAM: code, data, stacks and free memory
* 0x80F4_0200 16 B mtime, mtimecmp
* 0xA000_0000 64 MiB PLIC
*
* MRAM is directly readable, writable and executable, so .data runs in
* place and needs no copy from a load address.
*/
OUTPUT_ARCH( "riscv" )
ENTRY( _start )
MEMORY
{
MRAM (rwx) : ORIGIN = 0x40000200, LENGTH = 0x00FFFE00
}
PHDRS
{
text PT_LOAD FLAGS(5); /* PF_R | PF_X */
data PT_LOAD FLAGS(6); /* PF_R | PF_W */
}
SECTIONS
{
/* _start must stay at the load address, so the 4 KiB aligned trap
vector goes in the next output section rather than this one. */
.text.entry : {
KEEP(*(.text.entry))
} > MRAM :text
.text : {
KEEP(*(.text.trap))
*(.text .text.*)
} > MRAM :text
.rodata : {
. = ALIGN(16);
*(.srodata .srodata.*)
. = ALIGN(16);
*(.rodata .rodata.*)
} > MRAM :text
.data : {
. = ALIGN(16);
PROVIDE( __global_pointer$ = . + 0x800 );
*(.sdata .sdata.*)
. = ALIGN(16);
*(.data .data.*)
} > MRAM :data
.bss (NOLOAD) : {
. = ALIGN(16);
_bss_start = .;
*(.sbss .sbss.*)
. = ALIGN(16);
*(.bss .bss.*)
*(COMMON)
. = ALIGN(16);
_bss_end = .;
} > MRAM :data
.stack (NOLOAD) : {
. = ALIGN(16);
_sysstack_start = .;
. += 0x1000;
_sysstack_end = .;
} > MRAM :data
PROVIDE(_end = .);
}
|
