From 97f3f68c21fb5edaf4503b9aef6beefddf316d76 Mon Sep 17 00:00:00 2001 From: Finn Thain Date: Fri, 11 Apr 2014 15:27:58 +1000 Subject: m68k: Toward platform agnostic framebuffer debug logging Code subject to #ifdef CONSOLE is made more generic, as was apparently intended by the original author. Remove console_put_stats() routine. If it should be somehow useful, it should also be useful on platforms without framebuffer debug logging. The present implementation is only built #if defined CONFIG_MAC && defined CONSOLE even though puts() works everywhere. Signed-off-by: Finn Thain Tested-by: Stephen N Chivers Signed-off-by: Geert Uytterhoeven --- arch/m68k/kernel/head.S | 112 +++++++++++------------------------------------- 1 file changed, 26 insertions(+), 86 deletions(-) (limited to 'arch/m68k/kernel/head.S') diff --git a/arch/m68k/kernel/head.S b/arch/m68k/kernel/head.S index 3ab329b88521..81e610bfa237 100644 --- a/arch/m68k/kernel/head.S +++ b/arch/m68k/kernel/head.S @@ -153,7 +153,7 @@ * ------------ * The console is also able to be turned off. The console in head.S * is specifically for debugging and can be very useful. It is surrounded by - * #ifdef CONSOLE/#endif clauses so it doesn't have to ship in known-good + * #ifdef / #endif clauses so it doesn't have to ship in known-good * kernels. It's basic algorithm is to determine the size of the screen * (in height/width and bit depth) and then use that information for * displaying an 8x8 font or an 8x16 (widthxheight). I prefer the 8x8 for @@ -198,9 +198,8 @@ * CONFIG_xxx: These are the obvious machine configuration defines created * during configuration. These are defined in autoconf.h. * - * CONSOLE: There is support for head.S console in this file. This - * console can talk to a Mac frame buffer, but could easily be extrapolated - * to extend it to support other platforms. + * CONSOLE_DEBUG: Only supports a Mac frame buffer but could easily be + * extended to support other platforms. * * TEST_MMU: This is a test harness for running on any given machine but * getting an MMU dump for another class of machine. The classes of machines @@ -274,7 +273,7 @@ #include #ifdef CONFIG_FRAMEBUFFER_CONSOLE -#define CONSOLE +#define CONSOLE_DEBUG #endif #ifdef CONFIG_EARLY_PRINTK @@ -480,22 +479,21 @@ func_define serial_putc,1 func_define console_putc,1 func_define console_init -func_define console_put_stats func_define console_put_penguin func_define console_plot_pixel,3 func_define console_scroll .macro putc ch -#if defined(CONSOLE) || defined(SERIAL_DEBUG) +#if defined(CONSOLE_DEBUG) || defined(SERIAL_DEBUG) pea \ch #endif -#ifdef CONSOLE +#ifdef CONSOLE_DEBUG func_call console_putc #endif #ifdef SERIAL_DEBUG func_call serial_putc #endif -#if defined(CONSOLE) || defined(SERIAL_DEBUG) +#if defined(CONSOLE_DEBUG) || defined(SERIAL_DEBUG) addql #4,%sp #endif .endm @@ -515,7 +513,7 @@ func_define putn,1 .endm .macro puts string -#if defined(CONSOLE) || defined(SERIAL_DEBUG) +#if defined(CONSOLE_DEBUG) || defined(SERIAL_DEBUG) __INITDATA .Lstr\@: .string "\string" @@ -651,11 +649,9 @@ ENTRY(__start) lea %pc@(L(mac_rowbytes)),%a1 movel %a0@,%a1@ -#ifdef SERIAL_DEBUG get_bi_record BI_MAC_SCCBASE lea %pc@(L(mac_sccbase)),%a1 movel %a0@,%a1@ -#endif L(test_notmac): #endif /* CONFIG_MAC */ @@ -885,13 +881,12 @@ L(nothp): */ #ifdef CONFIG_MAC is_not_mac(L(nocon)) -# ifdef CONSOLE +# ifdef CONSOLE_DEBUG console_init # ifdef CONFIG_LOGO console_put_penguin # endif /* CONFIG_LOGO */ - console_put_stats -# endif /* CONSOLE */ +# endif /* CONSOLE_DEBUG */ L(nocon): #endif /* CONFIG_MAC */ @@ -1396,15 +1391,13 @@ L(mmu_fixup_done): andl L(mac_videobase),%d0 addl #VIDEOMEMBASE,%d0 movel %d0,L(mac_videobase) -#if defined(CONSOLE) +#ifdef CONSOLE_DEBUG movel %pc@(L(phys_kernel_start)),%d0 subl #PAGE_OFFSET,%d0 subl %d0,L(console_font) subl %d0,L(console_font_data) #endif -#ifdef SERIAL_DEBUG orl #0x50000000,L(mac_sccbase) -#endif 1: #endif @@ -2734,7 +2727,11 @@ func_return get_new_page */ #ifdef CONFIG_MAC +/* You may define either or both of these. */ +#define MAC_USE_SCC_A /* Modem port */ +#define MAC_USE_SCC_B /* Printer port */ +#if defined(MAC_USE_SCC_A) || defined(MAC_USE_SCC_B) L(scc_initable_mac): .byte 4,0x44 /* x16, 1 stopbit, no parity */ .byte 3,0xc0 /* receiver: 8 bpc */ @@ -2748,6 +2745,7 @@ L(scc_initable_mac): .byte -1 .even #endif +#endif /* CONFIG_MAC */ #ifdef CONFIG_ATARI /* #define USE_PRINTER */ @@ -2843,6 +2841,7 @@ func_start serial_init,%d0/%d1/%a0/%a1 | movew #61,CUSTOMBASE+C_SERPER-ZTWOBASE 1: #endif + #ifdef CONFIG_ATARI is_not_atari(4f) movel %pc@(L(iobase)),%a1 @@ -2877,21 +2876,14 @@ func_start serial_init,%d0/%d1/%a0/%a1 jra L(serial_init_done) 4: #endif + #ifdef CONFIG_MAC is_not_mac(L(serial_init_not_mac)) - -#ifdef SERIAL_DEBUG - -/* You may define either or both of these. */ -#define MAC_USE_SCC_A /* Modem port */ -#define MAC_USE_SCC_B /* Printer port */ - +#if defined(MAC_USE_SCC_A) || defined(MAC_USE_SCC_B) #define mac_scc_cha_b_ctrl_offset 0x0 #define mac_scc_cha_a_ctrl_offset 0x2 #define mac_scc_cha_b_data_offset 0x4 #define mac_scc_cha_a_data_offset 0x6 - -#if defined(MAC_USE_SCC_A) || defined(MAC_USE_SCC_B) movel %pc@(L(mac_sccbase)),%a0 /* Reset SCC register pointer */ moveb %a0@(mac_scc_cha_a_ctrl_offset),%d0 @@ -2905,7 +2897,6 @@ func_start serial_init,%d0/%d1/%a0/%a1 subq #1,%d0 jne 5b #endif - #ifdef MAC_USE_SCC_A /* Initialize channel A */ lea %pc@(L(scc_initable_mac)),%a1 @@ -2916,7 +2907,6 @@ func_start serial_init,%d0/%d1/%a0/%a1 jra 5b 6: #endif /* MAC_USE_SCC_A */ - #ifdef MAC_USE_SCC_B /* Initialize channel B */ lea %pc@(L(scc_initable_mac)),%a1 @@ -2927,9 +2917,6 @@ func_start serial_init,%d0/%d1/%a0/%a1 jra 7b 8: #endif /* MAC_USE_SCC_B */ - -#endif /* SERIAL_DEBUG */ - jra L(serial_init_done) L(serial_init_not_mac): #endif /* CONFIG_MAC */ @@ -2998,27 +2985,19 @@ func_start serial_putc,%d0/%d1/%a0/%a1 #ifdef CONFIG_MAC is_not_mac(5f) - -#ifdef SERIAL_DEBUG - #if defined(MAC_USE_SCC_A) || defined(MAC_USE_SCC_B) movel %pc@(L(mac_sccbase)),%a1 #endif - #ifdef MAC_USE_SCC_A 3: btst #2,%a1@(mac_scc_cha_a_ctrl_offset) jeq 3b moveb %d0,%a1@(mac_scc_cha_a_data_offset) #endif /* MAC_USE_SCC_A */ - #ifdef MAC_USE_SCC_B 4: btst #2,%a1@(mac_scc_cha_b_ctrl_offset) jeq 4b moveb %d0,%a1@(mac_scc_cha_b_data_offset) #endif /* MAC_USE_SCC_B */ - -#endif /* SERIAL_DEBUG */ - jra L(serial_putc_done) 5: #endif /* CONFIG_MAC */ @@ -3195,7 +3174,7 @@ func_start puts,%d0/%a0 movel ARG1,%a0 jra 2f 1: -#ifdef CONSOLE +#ifdef CONSOLE_DEBUG console_putc %d0 #endif #ifdef SERIAL_DEBUG @@ -3224,7 +3203,7 @@ func_start putn,%d0-%d2 jls 2f addb #'A'-('9'+1),%d2 2: -#ifdef CONSOLE +#ifdef CONSOLE_DEBUG console_putc %d2 #endif #ifdef SERIAL_DEBUG @@ -3256,7 +3235,7 @@ ENTRY(mac_early_print) movel %sp@(22),%d1 /* fetch parameter */ jra 2f 1: -#ifdef CONSOLE +#ifdef CONSOLE_DEBUG console_putc %d0 #endif #ifdef SERIAL_DEBUG @@ -3292,7 +3271,7 @@ func_start set_leds,%d0/%a0 func_return set_leds #endif -#ifdef CONSOLE +#ifdef CONSOLE_DEBUG /* * For continuity, see the data alignment * to which this structure is tied. @@ -3396,43 +3375,6 @@ L(console_clear_loop): 1: func_return console_init -func_start console_put_stats,%a0/%d7 - /* - * Some of the register usage that follows - * a0 = pointer to boot_info - * d7 = value of boot_info fields - */ - puts "\nMacLinux\n" - -#ifdef SERIAL_DEBUG - puts "\n vidaddr:" - putn %pc@(L(mac_videobase)) /* video addr. */ - - puts "\n _stext:" - lea %pc@(_stext),%a0 - putn %a0 - - puts "\nbootinfo:" - lea %pc@(_end),%a0 - putn %a0 - - puts "\n cpuid:" - putn %pc@(L(cputype)) - -# ifdef CONFIG_MAC - puts "\n sccbase:" - putn %pc@(L(mac_sccbase)) -# endif -# ifdef MMU_PRINT - putc '\n' - jbsr mmu_print_machine_cpu_types -# endif -#endif /* SERIAL_DEBUG */ - - putc '\n' - -func_return console_put_stats - #ifdef CONFIG_LOGO func_start console_put_penguin,%a0-%a1/%d0-%d7 /* @@ -3774,7 +3716,7 @@ L(white_16): L(console_plot_pixel_exit): func_return console_plot_pixel -#endif /* CONSOLE */ +#endif /* CONSOLE_DEBUG */ __INITDATA @@ -3787,7 +3729,7 @@ L(iobase): .long 0 #endif -#if defined(CONSOLE) +#ifdef CONSOLE_DEBUG L(console_globals): .long 0 /* cursor column */ .long 0 /* cursor row */ @@ -3798,7 +3740,7 @@ L(console_font): .long 0 /* pointer to console font (struct font_desc) */ L(console_font_data): .long 0 /* pointer to console font data */ -#endif /* CONSOLE */ +#endif /* CONSOLE_DEBUG */ #if defined(MMU_PRINT) L(mmu_print_data): @@ -3856,10 +3798,8 @@ L(mac_dimensions): .long 0 L(mac_rowbytes): .long 0 -#ifdef SERIAL_DEBUG L(mac_sccbase): .long 0 -#endif #endif /* CONFIG_MAC */ #if defined (CONFIG_APOLLO) -- cgit v1.2.3 From 7913ad1ad83409e7f9ed5758bb4324bf64c95a73 Mon Sep 17 00:00:00 2001 From: Finn Thain Date: Sat, 12 Apr 2014 23:48:56 +1000 Subject: m68k: Multi-platform EARLY_PRINTK Make the boot console available to more m68k platforms by leveraging the head.S debug console. The boot console is enabled by the "earlyprintk" command line argument which is how most other architectures do this. This is a change of behaviour for the Mac but does not negatively impact the common use-case which is not debugging. This is also a change of behaviour for other platforms because it means the serial port stays quiet when CONFIG_EARLY_PRINTK is not enabled. This is also an improvement for the common use-case. Signed-off-by: Finn Thain Tested-by: Stephen N Chivers [Geert: CONSOLE_DEBUG should depend on CONFIG_FONT_SUPPORT] Reported-by: kbuild test robot Signed-off-by: Geert Uytterhoeven --- arch/m68k/kernel/head.S | 36 ++++++++++++------------------------ 1 file changed, 12 insertions(+), 24 deletions(-) (limited to 'arch/m68k/kernel/head.S') diff --git a/arch/m68k/kernel/head.S b/arch/m68k/kernel/head.S index 81e610bfa237..a3cfada88368 100644 --- a/arch/m68k/kernel/head.S +++ b/arch/m68k/kernel/head.S @@ -221,7 +221,7 @@ * MMU_PRINT: There is a routine built into head.S that can display the * MMU data structures. It outputs its result through the serial_putc * interface. So where ever that winds up driving data, that's where the - * mmu struct will appear. On the Macintosh that's typically the console. + * mmu struct will appear. * * SERIAL_DEBUG: There are a series of putc() macro statements * scattered through out the code to give progress of status to the @@ -249,8 +249,8 @@ * USE_MFP: Use the ST-MFP port (Modem1) for serial debug. * * Macintosh constants: - * MAC_USE_SCC_A: Use SCC port A (modem) for serial debug and early console. - * MAC_USE_SCC_B: Use SCC port B (printer) for serial debug and early console. + * MAC_USE_SCC_A: Use SCC port A (modem) for serial debug. + * MAC_USE_SCC_B: Use SCC port B (printer) for serial debug. */ #include @@ -267,27 +267,17 @@ #include #include #include - #ifdef CONFIG_MAC - -#include - -#ifdef CONFIG_FRAMEBUFFER_CONSOLE -#define CONSOLE_DEBUG +# include #endif #ifdef CONFIG_EARLY_PRINTK -#define SERIAL_DEBUG -#else -#undef SERIAL_DEBUG +# define SERIAL_DEBUG +# if defined(CONFIG_MAC) && defined(CONFIG_FONT_SUPPORT) +# define CONSOLE_DEBUG +# endif #endif -#else /* !CONFIG_MAC */ - -#define SERIAL_DEBUG - -#endif /* !CONFIG_MAC */ - #undef MMU_PRINT #undef MMU_NOCACHE_KERNEL #undef DEBUG @@ -3213,21 +3203,19 @@ func_start putn,%d0-%d2 func_return putn -#ifdef CONFIG_MAC +#ifdef CONFIG_EARLY_PRINTK /* - * mac_early_print - * * This routine takes its parameters on the stack. It then * turns around and calls the internal routines. This routine * is used by the boot console. * * The calling parameters are: - * void mac_early_print(const char *str, unsigned length); + * void debug_cons_nputs(const char *str, unsigned length) * * This routine does NOT understand variable arguments only * simple strings! */ -ENTRY(mac_early_print) +ENTRY(debug_cons_nputs) moveml %d0/%d1/%a0,%sp@- movew %sr,%sp@- ori #0x0700,%sr @@ -3249,7 +3237,7 @@ ENTRY(mac_early_print) movew %sp@+,%sr moveml %sp@+,%d0/%d1/%a0 rts -#endif /* CONFIG_MAC */ +#endif /* CONFIG_EARLY_PRINTK */ #if defined(CONFIG_HP300) || defined(CONFIG_APOLLO) func_start set_leds,%d0/%a0 -- cgit v1.2.3 From c46f46d02c90959b82b99badfadc575081666aae Mon Sep 17 00:00:00 2001 From: Finn Thain Date: Sat, 12 Apr 2014 23:49:30 +1000 Subject: m68k/mvme16x: Adopt common boot console In a multi-platform kernel binary we only need one early console instance. The difficulty here is that the common early console is started by early_param(), whereas the MVME16x instance is started later by config_mvme16x(). That means some interrupt setup must be done earlier. Signed-off-by: Finn Thain Tested-by: Stephen N Chivers [Geert] Tag debug_cons_write() with __ref to kill section mismatch warning Signed-off-by: Geert Uytterhoeven --- arch/m68k/kernel/head.S | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'arch/m68k/kernel/head.S') diff --git a/arch/m68k/kernel/head.S b/arch/m68k/kernel/head.S index a3cfada88368..b671f07aeb81 100644 --- a/arch/m68k/kernel/head.S +++ b/arch/m68k/kernel/head.S @@ -2936,6 +2936,15 @@ L(serial_init_not_mac): 2: #endif +#ifdef CONFIG_MVME16x + is_not_mvme16x(L(serial_init_not_mvme16x)) + moveb #0x10,M167_PCSCCMICR + moveb #0x10,M167_PCSCCTICR + moveb #0x10,M167_PCSCCRICR + jra L(serial_init_done) +L(serial_init_not_mvme16x): +#endif + #ifdef CONFIG_APOLLO /* We count on the PROM initializing SIO1 */ #endif @@ -3768,7 +3777,9 @@ M167_CYIER = 0xfff45011 M167_CYLICR = 0xfff45026 M167_CYTEOIR = 0xfff45085 M167_CYTDR = 0xfff450f8 +M167_PCSCCMICR = 0xfff4201d M167_PCSCCTICR = 0xfff4201e +M167_PCSCCRICR = 0xfff4201f M167_PCTPIACKR = 0xfff42025 #endif -- cgit v1.2.3 From 83adc18110d632eebefb5c2a1dd27b58ae843d64 Mon Sep 17 00:00:00 2001 From: Finn Thain Date: Mon, 26 May 2014 23:29:19 +1000 Subject: m68k/atari: fix SCC initialization for debug console Fix SCC initialization for Atari as was previously fixed for Mac. It's probably not practical to share more code but some attempt is made to align the Mac and Atari variants. Signed-off-by: Finn Thain Signed-off-by: Geert Uytterhoeven --- arch/m68k/kernel/head.S | 31 +++++++++++++++++++++---------- 1 file changed, 21 insertions(+), 10 deletions(-) (limited to 'arch/m68k/kernel/head.S') diff --git a/arch/m68k/kernel/head.S b/arch/m68k/kernel/head.S index b671f07aeb81..15c8f55e4835 100644 --- a/arch/m68k/kernel/head.S +++ b/arch/m68k/kernel/head.S @@ -2722,6 +2722,7 @@ func_return get_new_page #define MAC_USE_SCC_B /* Printer port */ #if defined(MAC_USE_SCC_A) || defined(MAC_USE_SCC_B) +/* Initialisation table for SCC with 3.6864 MHz PCLK */ L(scc_initable_mac): .byte 4,0x44 /* x16, 1 stopbit, no parity */ .byte 3,0xc0 /* receiver: 8 bpc */ @@ -2744,14 +2745,12 @@ L(scc_initable_mac): #define USE_MFP #if defined(USE_SCC_A) || defined(USE_SCC_B) -#define USE_SCC -/* Initialisation table for SCC */ -L(scc_initable): - .byte 9,12 /* Reset */ +/* Initialisation table for SCC with 7.9872 MHz PCLK */ +/* PCLK == 8.0539 gives baud == 9680.1 */ +L(scc_initable_atari): .byte 4,0x44 /* x16, 1 stopbit, no parity */ .byte 3,0xc0 /* receiver: 8 bpc */ .byte 5,0xe2 /* transmitter: 8 bpc, assert dtr/rts */ - .byte 9,0 /* no interrupts */ .byte 10,0 /* NRZ */ .byte 11,0x50 /* use baud rate generator */ .byte 12,24,13,0 /* 9600 baud */ @@ -2800,7 +2799,7 @@ LMFP_UDR = 0xfffa2f */ /* - * Initialize serial port hardware for 9600/8/1 + * Initialize serial port hardware */ func_start serial_init,%d0/%d1/%a0/%a1 /* @@ -2810,7 +2809,7 @@ func_start serial_init,%d0/%d1/%a0/%a1 * d0 = boot info offset * CONFIG_ATARI * a0 = address of SCC - * a1 = Liobase address/address of scc_initable + * a1 = Liobase address/address of scc_initable_atari * d0 = init data for serial port * CONFIG_MAC * a0 = address of SCC @@ -2846,9 +2845,21 @@ func_start serial_init,%d0/%d1/%a0/%a1 moveb %a1@(LPSG_READ),%d0 bset #5,%d0 moveb %d0,%a1@(LPSG_WRITE) -#elif defined(USE_SCC) +#elif defined(USE_SCC_A) || defined(USE_SCC_B) lea %a1@(LSCC_CTRL),%a0 - lea %pc@(L(scc_initable)),%a1 + /* Reset SCC register pointer */ + moveb %a0@,%d0 + /* Reset SCC device: write register pointer then register value */ + moveb #9,%a0@ + moveb #0xc0,%a0@ + /* Wait for 5 PCLK cycles, which is about 63 CPU cycles */ + /* 5 / 7.9872 MHz = approx. 0.63 us = 63 / 100 MHz */ + movel #32,%d0 +2: + subq #1,%d0 + jne 2b + /* Initialize channel */ + lea %pc@(L(scc_initable_atari)),%a1 2: moveb %a1@+,%d0 jmi 3f moveb %d0,%a0@ @@ -3017,7 +3028,7 @@ func_start serial_putc,%d0/%d1/%a0/%a1 nop bset #5,%d0 moveb %d0,%a1@(LPSG_WRITE) -#elif defined(USE_SCC) +#elif defined(USE_SCC_A) || defined(USE_SCC_B) 3: btst #2,%a1@(LSCC_CTRL) jeq 3b moveb %d0,%a1@(LSCC_DATA) -- cgit v1.2.3 From 486df8bc4627bdfc032d11bedcd056cc5343ee62 Mon Sep 17 00:00:00 2001 From: Andreas Schwab Date: Thu, 24 Apr 2014 12:24:48 +0200 Subject: m68k: Increase initial mapping to 8 or 16 MiB if possible If the size of the first memory chunk is at least 8 or 16 MiB increase the initial mapping to 8 resp. 16 MiB instead of 4 MiB. This makes it possible to 1. Map more memory in the first node without running out of space for the page tables, 2. Boot kernels that don't fit in 4 MiB (e.g. multi_defconfig). Signed-off-by: Andreas Schwab - Add support for 8 MiB, - Store initial mapping size in head.S for later reuse, - Add comment about large kernels. Signed-off-by: Geert Uytterhoeven --- arch/m68k/kernel/head.S | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) (limited to 'arch/m68k/kernel/head.S') diff --git a/arch/m68k/kernel/head.S b/arch/m68k/kernel/head.S index 15c8f55e4835..dbb118e1a4e0 100644 --- a/arch/m68k/kernel/head.S +++ b/arch/m68k/kernel/head.S @@ -292,6 +292,7 @@ .globl kernel_pg_dir .globl availmem +.globl m68k_init_mapped_size .globl m68k_pgtable_cachemode .globl m68k_supervisor_cachemode #ifdef CONFIG_MVME16x @@ -907,10 +908,21 @@ L(nocon): * * This block of code does what's necessary to map in the various kinds * of machines for execution of Linux. - * First map the first 4 MB of kernel code & data + * First map the first 4, 8, or 16 MB of kernel code & data */ - mmu_map #PAGE_OFFSET,%pc@(L(phys_kernel_start)),#4*1024*1024,\ + get_bi_record BI_MEMCHUNK + movel %a0@(4),%d0 + movel #16*1024*1024,%d1 + cmpl %d0,%d1 + jls 1f + lsrl #1,%d1 + cmpl %d0,%d1 + jls 1f + lsrl #1,%d1 +1: + movel %d1,m68k_init_mapped_size + mmu_map #PAGE_OFFSET,%pc@(L(phys_kernel_start)),%d1,\ %pc@(m68k_supervisor_cachemode) putc 'C' @@ -3730,6 +3742,9 @@ func_return console_plot_pixel __INITDATA .align 4 +m68k_init_mapped_size: + .long 0 + #if defined(CONFIG_ATARI) || defined(CONFIG_AMIGA) || \ defined(CONFIG_HP300) || defined(CONFIG_APOLLO) L(custom): -- cgit v1.2.3