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m68knommu: platform code merge for 68000 core cpus
This patch merges all 68000 core cpus into one directory. There is a lot of common code in the 68328, 68EZ328 and 68VZ328 directories. This will also facilitate easy development of support for original stand alone MC68000 CPU machines. Signed-off-by: Luis Alves <[email protected]> Signed-off-by: Greg Ungerer <[email protected]>
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| Original file line number | Diff line number | Diff line change |
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| ################################################## | ||
| # | ||
| # Makefile for 68000 core based cpus | ||
| # | ||
| # 2012.10.21, Luis Alves <[email protected]> | ||
| # Merged all 68000 based cpu's config | ||
| # files into a single directory. | ||
| # | ||
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| # 68328, 68EZ328, 68VZ328 | ||
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| obj-y += entry.o ints.o timers.o | ||
| obj-$(CONFIG_M68328) += m68328.o | ||
| obj-$(CONFIG_M68EZ328) += m68EZ328.o | ||
| obj-$(CONFIG_M68VZ328) += m68VZ328.o | ||
| obj-$(CONFIG_ROM) += romvec.o | ||
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| extra-y := head.o |
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| /* | ||
| * head.S - Common startup code for 68000 core based CPU's | ||
| * | ||
| * 2012.10.21, Luis Alves <[email protected]>, Single head.S file for all | ||
| * 68000 core based CPU's. Based on the sources from: | ||
| * Coldfire by Greg Ungerer <[email protected]> | ||
| * 68328 by D. Jeff Dionne <[email protected]>, | ||
| * Kenneth Albanowski <[email protected]>, | ||
| * The Silver Hammer Group, Ltd. | ||
| * | ||
| */ | ||
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| #include <linux/linkage.h> | ||
| #include <linux/init.h> | ||
| #include <asm/asm-offsets.h> | ||
| #include <asm/thread_info.h> | ||
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| /***************************************************************************** | ||
| * UCSIMM and UCDIMM use CONFIG_MEMORY_RESERVE to reserve some RAM | ||
| *****************************************************************************/ | ||
| #ifdef CONFIG_MEMORY_RESERVE | ||
| #define RAMEND (CONFIG_RAMBASE+CONFIG_RAMSIZE)-(CONFIG_MEMORY_RESERVE*0x100000) | ||
| #else | ||
| #define RAMEND (CONFIG_RAMBASE+CONFIG_RAMSIZE) | ||
| #endif | ||
| /*****************************************************************************/ | ||
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| .global _start | ||
| .global _rambase | ||
| .global _ramvec | ||
| .global _ramstart | ||
| .global _ramend | ||
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| #if defined(CONFIG_PILOT) || defined(CONFIG_INIT_LCD) | ||
| .global bootlogo_bits | ||
| #endif | ||
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| /* Defining DEBUG_HEAD_CODE, serial port in 68x328 is inited */ | ||
| /* #define DEBUG_HEAD_CODE */ | ||
| #undef DEBUG_HEAD_CODE | ||
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| .data | ||
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| /***************************************************************************** | ||
| * RAM setup pointers. Used by the kernel to determine RAM location and size. | ||
| *****************************************************************************/ | ||
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| _rambase: | ||
| .long 0 | ||
| _ramvec: | ||
| .long 0 | ||
| _ramstart: | ||
| .long 0 | ||
| _ramend: | ||
| .long 0 | ||
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| __HEAD | ||
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| /***************************************************************************** | ||
| * Entry point, where all begins! | ||
| *****************************************************************************/ | ||
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| _start: | ||
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| /* Pilot need this specific signature at the start of ROM */ | ||
| #ifdef CONFIG_PILOT | ||
| .byte 0x4e, 0xfa, 0x00, 0x0a /* bra opcode (jmp 10 bytes) */ | ||
| .byte 'b', 'o', 'o', 't' | ||
| .word 10000 | ||
| nop | ||
| moveq #0, %d0 | ||
| movew %d0, 0xfffff618 /* Watchdog off */ | ||
| movel #0x00011f07, 0xfffff114 /* CS A1 Mask */ | ||
| #endif /* CONFIG_PILOT */ | ||
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| movew #0x2700, %sr /* disable all interrupts */ | ||
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| /***************************************************************************** | ||
| * Setup PLL and wait for it to settle (in 68x328 cpu's). | ||
| * Also, if enabled, init serial port. | ||
| *****************************************************************************/ | ||
| #if defined(CONFIG_M68328) || \ | ||
| defined(CONFIG_M68EZ328) || \ | ||
| defined(CONFIG_M68VZ328) | ||
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| /* Serial port setup. Should only be needed if debugging this startup code. */ | ||
| #ifdef DEBUG_HEAD_CODE | ||
| movew #0x0800, 0xfffff906 /* Ignore CTS */ | ||
| movew #0x010b, 0xfffff902 /* BAUD to 9600 */ | ||
| movew #0xe100, 0xfffff900 /* enable */ | ||
| #endif /* DEBUG_HEAD */ | ||
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| #ifdef CONFIG_PILOT | ||
| movew #0x2410, 0xfffff200 /* PLLCR */ | ||
| #else | ||
| movew #0x2400, 0xfffff200 /* PLLCR */ | ||
| #endif | ||
| movew #0x0123, 0xfffff202 /* PLLFSR */ | ||
| moveq #0, %d0 | ||
| movew #16384, %d0 /* PLL settle wait loop */ | ||
| _pll_settle: | ||
| subw #1, %d0 | ||
| bne _pll_settle | ||
| #endif /* CONFIG_M68x328 */ | ||
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| /***************************************************************************** | ||
| * If running kernel from ROM some specific initialization has to be done. | ||
| * (Assuming that everything is already init'ed when running from RAM) | ||
| *****************************************************************************/ | ||
| #ifdef CONFIG_ROMKERNEL | ||
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| /***************************************************************************** | ||
| * Init chip registers (uCsimm specific) | ||
| *****************************************************************************/ | ||
| #ifdef CONFIG_UCSIMM | ||
| moveb #0x00, 0xfffffb0b /* Watchdog off */ | ||
| moveb #0x10, 0xfffff000 /* SCR */ | ||
| moveb #0x00, 0xfffff40b /* enable chip select */ | ||
| moveb #0x00, 0xfffff423 /* enable /DWE */ | ||
| moveb #0x08, 0xfffffd0d /* disable hardmap */ | ||
| moveb #0x07, 0xfffffd0e /* level 7 interrupt clear */ | ||
| movew #0x8600, 0xfffff100 /* FLASH at 0x10c00000 */ | ||
| movew #0x018b, 0xfffff110 /* 2Meg, enable, 0ws */ | ||
| movew #0x8f00, 0xfffffc00 /* DRAM configuration */ | ||
| movew #0x9667, 0xfffffc02 /* DRAM control */ | ||
| movew #0x0000, 0xfffff106 /* DRAM at 0x00000000 */ | ||
| movew #0x068f, 0xfffff116 /* 8Meg, enable, 0ws */ | ||
| moveb #0x40, 0xfffff300 /* IVR */ | ||
| movel #0x007FFFFF, %d0 /* IMR */ | ||
| movel %d0, 0xfffff304 | ||
| moveb 0xfffff42b, %d0 | ||
| andb #0xe0, %d0 | ||
| moveb %d0, 0xfffff42b | ||
| #endif | ||
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| /***************************************************************************** | ||
| * Init LCD controller. | ||
| * (Assuming that LCD controller is already init'ed when running from RAM) | ||
| *****************************************************************************/ | ||
| #ifdef CONFIG_INIT_LCD | ||
| #ifdef CONFIG_PILOT | ||
| moveb #0, 0xfffffA27 /* LCKCON */ | ||
| movel #_start, 0xfffffA00 /* LSSA */ | ||
| moveb #0xa, 0xfffffA05 /* LVPW */ | ||
| movew #0x9f, 0xFFFFFa08 /* LXMAX */ | ||
| movew #0x9f, 0xFFFFFa0a /* LYMAX */ | ||
| moveb #9, 0xfffffa29 /* LBAR */ | ||
| moveb #0, 0xfffffa25 /* LPXCD */ | ||
| moveb #0x04, 0xFFFFFa20 /* LPICF */ | ||
| moveb #0x58, 0xfffffA27 /* LCKCON */ | ||
| moveb #0x85, 0xfffff429 /* PFDATA */ | ||
| moveb #0xd8, 0xfffffA27 /* LCKCON */ | ||
| moveb #0xc5, 0xfffff429 /* PFDATA */ | ||
| moveb #0xd5, 0xfffff429 /* PFDATA */ | ||
| movel #bootlogo_bits, 0xFFFFFA00 /* LSSA */ | ||
| moveb #10, 0xFFFFFA05 /* LVPW */ | ||
| movew #160, 0xFFFFFA08 /* LXMAX */ | ||
| movew #160, 0xFFFFFA0A /* LYMAX */ | ||
| #else /* CONFIG_PILOT */ | ||
| movel #bootlogo_bits, 0xfffffA00 /* LSSA */ | ||
| moveb #0x28, 0xfffffA05 /* LVPW */ | ||
| movew #0x280, 0xFFFFFa08 /* LXMAX */ | ||
| movew #0x1df, 0xFFFFFa0a /* LYMAX */ | ||
| moveb #0, 0xfffffa29 /* LBAR */ | ||
| moveb #0, 0xfffffa25 /* LPXCD */ | ||
| moveb #0x08, 0xFFFFFa20 /* LPICF */ | ||
| moveb #0x01, 0xFFFFFA21 /* -ve pol */ | ||
| moveb #0x81, 0xfffffA27 /* LCKCON */ | ||
| movew #0xff00, 0xfffff412 /* LCD pins */ | ||
| #endif /* CONFIG_PILOT */ | ||
| #endif /* CONFIG_INIT_LCD */ | ||
|
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| /***************************************************************************** | ||
| * Kernel is running from FLASH/ROM (XIP) | ||
| * Copy init text & data to RAM | ||
| *****************************************************************************/ | ||
| moveal #_etext, %a0 | ||
| moveal #_sdata, %a1 | ||
| moveal #__bss_start, %a2 | ||
| _copy_initmem: | ||
| movel %a0@+, %a1@+ | ||
| cmpal %a1, %a2 | ||
| bhi _copy_initmem | ||
| #endif /* CONFIG_ROMKERNEL */ | ||
|
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| /***************************************************************************** | ||
| * Setup basic memory information for kernel | ||
| *****************************************************************************/ | ||
| movel #CONFIG_VECTORBASE,_ramvec /* set vector base location */ | ||
| movel #CONFIG_RAMBASE,_rambase /* set the base of RAM */ | ||
| movel #RAMEND, _ramend /* set end ram addr */ | ||
| lea __bss_stop,%a1 | ||
| movel %a1,_ramstart | ||
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| /***************************************************************************** | ||
| * If the kernel is in RAM, move romfs to right above bss and | ||
| * adjust _ramstart to where romfs ends. | ||
| * | ||
| * (Do this only if CONFIG_MTD_UCLINUX is true) | ||
| *****************************************************************************/ | ||
|
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| #if defined(CONFIG_ROMFS_FS) && defined(CONFIG_RAMKERNEL) && \ | ||
| defined(CONFIG_MTD_UCLINUX) | ||
| lea __bss_start, %a0 /* get start of bss */ | ||
| lea __bss_stop, %a1 /* set up destination */ | ||
| movel %a0, %a2 /* copy of bss start */ | ||
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| movel 8(%a0), %d0 /* get size of ROMFS */ | ||
| addql #8, %d0 /* allow for rounding */ | ||
| andl #0xfffffffc, %d0 /* whole words */ | ||
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| addl %d0, %a0 /* copy from end */ | ||
| addl %d0, %a1 /* copy from end */ | ||
| movel %a1, _ramstart /* set start of ram */ | ||
| _copy_romfs: | ||
| movel -(%a0), -(%a1) /* copy dword */ | ||
| cmpl %a0, %a2 /* check if at end */ | ||
| bne _copy_romfs | ||
| #endif /* CONFIG_ROMFS_FS && CONFIG_RAMKERNEL && CONFIG_MTD_UCLINUX */ | ||
|
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| /***************************************************************************** | ||
| * Clear bss region | ||
| *****************************************************************************/ | ||
| lea __bss_start, %a0 /* get start of bss */ | ||
| lea __bss_stop, %a1 /* get end of bss */ | ||
| _clear_bss: | ||
| movel #0, (%a0)+ /* clear each word */ | ||
| cmpl %a0, %a1 /* check if at end */ | ||
| bne _clear_bss | ||
|
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| /***************************************************************************** | ||
| * Load the current task pointer and stack. | ||
| *****************************************************************************/ | ||
| lea init_thread_union,%a0 | ||
| lea THREAD_SIZE(%a0),%sp | ||
| jsr start_kernel /* start Linux kernel */ | ||
| _exit: | ||
| jmp _exit /* should never get here */ |
2 changes: 1 addition & 1 deletion
2
arch/m68k/platform/68328/ints.c → arch/m68k/platform/68000/ints.c
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2 changes: 1 addition & 1 deletion
2
arch/m68k/platform/68328/config.c → arch/m68k/platform/68000/m68328.c
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2 changes: 1 addition & 1 deletion
2
arch/m68k/platform/68EZ328/config.c → arch/m68k/platform/68000/m68EZ328.c
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2 changes: 1 addition & 1 deletion
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arch/m68k/platform/68328/romvec.S → arch/m68k/platform/68000/romvec.S
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arch/m68k/platform/68328/timers.c → arch/m68k/platform/68000/timers.c
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