c6345ab1a3
In order to safely work around anomaly 05000491, we have to execute IFLUSH from L1 instruction sram. The trouble with multi-core systems is that all L1 sram is visible only to the active core. So we can't just place the functions into L1 and call it directly. We need to setup a jump table and place the entry point in external memory. This will call the right func based on the active core. In the process, convert from the manual relocation of a small bit of code into Core B's L1 to the more general framework we already have in place for loading arbitrary pieces of code into L1. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
273 lines
4.9 KiB
ArmAsm
273 lines
4.9 KiB
ArmAsm
/*
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* Copyright 2004-2009 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later
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*/
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#include <asm-generic/vmlinux.lds.h>
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#include <asm/mem_map.h>
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#include <asm/page.h>
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#include <asm/thread_info.h>
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OUTPUT_FORMAT("elf32-bfin")
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ENTRY(__start)
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_jiffies = _jiffies_64;
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SECTIONS
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{
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#ifdef CONFIG_RAMKERNEL
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. = CONFIG_BOOT_LOAD;
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#else
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. = CONFIG_ROM_BASE;
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#endif
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/* Neither the text, ro_data or bss section need to be aligned
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* So pack them back to back
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*/
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.text :
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{
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__text = .;
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_text = .;
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__stext = .;
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TEXT_TEXT
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#ifndef CONFIG_SCHEDULE_L1
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SCHED_TEXT
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#endif
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LOCK_TEXT
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IRQENTRY_TEXT
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KPROBES_TEXT
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#ifdef CONFIG_ROMKERNEL
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__sinittext = .;
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INIT_TEXT
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__einittext = .;
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EXIT_TEXT
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#endif
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*(.text.*)
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*(.fixup)
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#if !L1_CODE_LENGTH
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*(.l1.text)
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#endif
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__etext = .;
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}
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EXCEPTION_TABLE(4)
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NOTES
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/* Just in case the first read only is a 32-bit access */
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RO_DATA(4)
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__rodata_end = .;
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#ifdef CONFIG_ROMKERNEL
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. = CONFIG_BOOT_LOAD;
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.bss : AT(__rodata_end)
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#else
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.bss :
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#endif
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{
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. = ALIGN(4);
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___bss_start = .;
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*(.bss .bss.*)
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*(COMMON)
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#if !L1_DATA_A_LENGTH
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*(.l1.bss)
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#endif
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#if !L1_DATA_B_LENGTH
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*(.l1.bss.B)
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#endif
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. = ALIGN(4);
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___bss_stop = .;
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}
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#if defined(CONFIG_ROMKERNEL)
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.data : AT(LOADADDR(.bss) + SIZEOF(.bss))
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#else
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.data :
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#endif
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{
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__sdata = .;
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/* This gets done first, so the glob doesn't suck it in */
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CACHELINE_ALIGNED_DATA(32)
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#if !L1_DATA_A_LENGTH
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. = ALIGN(32);
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*(.data_l1.cacheline_aligned)
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*(.l1.data)
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#endif
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#if !L1_DATA_B_LENGTH
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*(.l1.data.B)
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#endif
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#if !L2_LENGTH
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. = ALIGN(32);
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*(.data_l2.cacheline_aligned)
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*(.l2.data)
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#endif
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DATA_DATA
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CONSTRUCTORS
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INIT_TASK_DATA(THREAD_SIZE)
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__edata = .;
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}
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__data_lma = LOADADDR(.data);
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__data_len = SIZEOF(.data);
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/* The init section should be last, so when we free it, it goes into
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* the general memory pool, and (hopefully) will decrease fragmentation
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* a tiny bit. The init section has a _requirement_ that it be
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* PAGE_SIZE aligned
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*/
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. = ALIGN(PAGE_SIZE);
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___init_begin = .;
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#ifdef CONFIG_RAMKERNEL
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INIT_TEXT_SECTION(PAGE_SIZE)
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/* We have to discard exit text and such at runtime, not link time, to
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* handle embedded cross-section references (alt instructions, bug
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* table, eh_frame, etc...). We need all of our .text up front and
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* .data after it for PCREL call issues.
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*/
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.exit.text :
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{
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EXIT_TEXT
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}
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. = ALIGN(16);
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INIT_DATA_SECTION(16)
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PERCPU(32, PAGE_SIZE)
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.exit.data :
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{
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EXIT_DATA
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}
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.text_l1 L1_CODE_START : AT(LOADADDR(.exit.data) + SIZEOF(.exit.data))
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#else
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.init.data : AT(__data_lma + __data_len)
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{
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__sinitdata = .;
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INIT_DATA
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INIT_SETUP(16)
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INIT_CALLS
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CON_INITCALL
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SECURITY_INITCALL
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INIT_RAM_FS
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. = ALIGN(4);
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___per_cpu_load = .;
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___per_cpu_start = .;
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*(.data.percpu.first)
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*(.data.percpu.page_aligned)
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*(.data.percpu)
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*(.data.percpu.shared_aligned)
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___per_cpu_end = .;
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EXIT_DATA
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__einitdata = .;
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}
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__init_data_lma = LOADADDR(.init.data);
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__init_data_len = SIZEOF(.init.data);
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__init_data_end = .;
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.text_l1 L1_CODE_START : AT(__init_data_lma + __init_data_len)
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#endif
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{
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. = ALIGN(4);
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__stext_l1 = .;
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*(.l1.text.head)
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*(.l1.text)
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#ifdef CONFIG_SCHEDULE_L1
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SCHED_TEXT
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#endif
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. = ALIGN(4);
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__etext_l1 = .;
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}
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__text_l1_lma = LOADADDR(.text_l1);
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__text_l1_len = SIZEOF(.text_l1);
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ASSERT (__text_l1_len <= L1_CODE_LENGTH, "L1 text overflow!")
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.data_l1 L1_DATA_A_START : AT(__text_l1_lma + __text_l1_len)
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{
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. = ALIGN(4);
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__sdata_l1 = .;
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*(.l1.data)
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__edata_l1 = .;
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. = ALIGN(32);
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*(.data_l1.cacheline_aligned)
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. = ALIGN(4);
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__sbss_l1 = .;
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*(.l1.bss)
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. = ALIGN(4);
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__ebss_l1 = .;
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}
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__data_l1_lma = LOADADDR(.data_l1);
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__data_l1_len = SIZEOF(.data_l1);
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ASSERT (__data_l1_len <= L1_DATA_A_LENGTH, "L1 data A overflow!")
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.data_b_l1 L1_DATA_B_START : AT(__data_l1_lma + __data_l1_len)
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{
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. = ALIGN(4);
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__sdata_b_l1 = .;
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*(.l1.data.B)
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__edata_b_l1 = .;
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. = ALIGN(4);
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__sbss_b_l1 = .;
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*(.l1.bss.B)
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. = ALIGN(4);
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__ebss_b_l1 = .;
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}
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__data_b_l1_lma = LOADADDR(.data_b_l1);
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__data_b_l1_len = SIZEOF(.data_b_l1);
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ASSERT (__data_b_l1_len <= L1_DATA_B_LENGTH, "L1 data B overflow!")
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.text_data_l2 L2_START : AT(__data_b_l1_lma + __data_b_l1_len)
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{
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. = ALIGN(4);
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__stext_l2 = .;
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*(.l2.text)
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. = ALIGN(4);
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__etext_l2 = .;
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. = ALIGN(4);
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__sdata_l2 = .;
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*(.l2.data)
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__edata_l2 = .;
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. = ALIGN(32);
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*(.data_l2.cacheline_aligned)
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. = ALIGN(4);
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__sbss_l2 = .;
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*(.l2.bss)
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. = ALIGN(4);
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__ebss_l2 = .;
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}
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__l2_lma = LOADADDR(.text_data_l2);
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__l2_len = SIZEOF(.text_data_l2);
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ASSERT (__l2_len <= L2_LENGTH, "L2 overflow!")
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/* Force trailing alignment of our init section so that when we
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* free our init memory, we don't leave behind a partial page.
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*/
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#ifdef CONFIG_RAMKERNEL
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. = __l2_lma + __l2_len;
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#else
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. = __init_data_end;
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#endif
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. = ALIGN(PAGE_SIZE);
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___init_end = .;
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__end =.;
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STABS_DEBUG
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DWARF_DEBUG
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DISCARDS
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}
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