/* setup.c: FRV specific setup * * Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * - Derived from arch/m68k/kernel/setup.c * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_BLK_DEV_INITRD #include #endif #include "local.h" #ifdef CONFIG_MB93090_MB00 static void __init mb93090_display(void); #endif #ifdef CONFIG_MMU static void __init setup_linux_memory(void); #else static void __init setup_uclinux_memory(void); #endif #ifdef CONFIG_MB93090_MB00 static char __initdata mb93090_banner[] = "FJ/RH FR-V Linux"; static char __initdata mb93090_version[] = UTS_RELEASE; int __nongprelbss mb93090_mb00_detected; #endif const char __frv_unknown_system[] = "unknown"; const char __frv_mb93091_cb10[] = "mb93091-cb10"; const char __frv_mb93091_cb11[] = "mb93091-cb11"; const char __frv_mb93091_cb30[] = "mb93091-cb30"; const char __frv_mb93091_cb41[] = "mb93091-cb41"; const char __frv_mb93091_cb60[] = "mb93091-cb60"; const char __frv_mb93091_cb70[] = "mb93091-cb70"; const char __frv_mb93091_cb451[] = "mb93091-cb451"; const char __frv_mb93090_mb00[] = "mb93090-mb00"; const char __frv_mb93493[] = "mb93493"; const char __frv_mb93093[] = "mb93093"; static const char *__nongprelbss cpu_series; static const char *__nongprelbss cpu_core; static const char *__nongprelbss cpu_silicon; static const char *__nongprelbss cpu_mmu; static const char *__nongprelbss cpu_system; static const char *__nongprelbss cpu_board1; static const char *__nongprelbss cpu_board2; static unsigned long __nongprelbss cpu_psr_all; static unsigned long __nongprelbss cpu_hsr0_all; unsigned long __nongprelbss pdm_suspend_mode; unsigned long __nongprelbss rom_length; unsigned long __nongprelbss memory_start; unsigned long __nongprelbss memory_end; unsigned long __nongprelbss dma_coherent_mem_start; unsigned long __nongprelbss dma_coherent_mem_end; unsigned long __initdata __sdram_old_base; unsigned long __initdata num_mappedpages; struct cpuinfo_frv __nongprelbss boot_cpu_data; char __initdata command_line[COMMAND_LINE_SIZE]; char __initdata redboot_command_line[COMMAND_LINE_SIZE]; #ifdef CONFIG_PM #define __pminit #define __pminitdata #define __pminitconst #else #define __pminit __init #define __pminitdata __initdata #define __pminitconst __initconst #endif struct clock_cmode { uint8_t xbus, sdram, corebus, core, dsu; }; #define _frac(N,D) ((N)<<4 | (D)) #define _x0_16 _frac(1,6) #define _x0_25 _frac(1,4) #define _x0_33 _frac(1,3) #define _x0_375 _frac(3,8) #define _x0_5 _frac(1,2) #define _x0_66 _frac(2,3) #define _x0_75 _frac(3,4) #define _x1 _frac(1,1) #define _x1_5 _frac(3,2) #define _x2 _frac(2,1) #define _x3 _frac(3,1) #define _x4 _frac(4,1) #define _x4_5 _frac(9,2) #define _x6 _frac(6,1) #define _x8 _frac(8,1) #define _x9 _frac(9,1) int __nongprelbss clock_p0_current; int __nongprelbss clock_cm_current; int __nongprelbss clock_cmode_current; #ifdef CONFIG_PM int __nongprelbss clock_cmodes_permitted; unsigned long __nongprelbss clock_bits_settable; #endif static struct clock_cmode __pminitdata undef_clock_cmode = { _x1, _x1, _x1, _x1, _x1 }; static struct clock_cmode __pminitdata clock_cmodes_fr401_fr403[16] = { [4] = { _x1, _x1, _x2, _x2, _x0_25 }, [5] = { _x1, _x2, _x4, _x4, _x0_5 }, [8] = { _x1, _x1, _x1, _x2, _x0_25 }, [9] = { _x1, _x2, _x2, _x4, _x0_5 }, [11] = { _x1, _x4, _x4, _x8, _x1 }, [12] = { _x1, _x1, _x2, _x4, _x0_5 }, [13] = { _x1, _x2, _x4, _x8, _x1 }, }; static struct clock_cmode __pminitdata clock_cmodes_fr405[16] = { [0] = { _x1, _x1, _x1, _x1, _x0_5 }, [1] = { _x1, _x1, _x1, _x3, _x0_25 }, [2] = { _x1, _x1, _x2, _x6, _x0_5 }, [3] = { _x1, _x2, _x2, _x6, _x0_5 }, [4] = { _x1, _x1, _x2, _x2, _x0_16 }, [8] = { _x1, _x1, _x1, _x2, _x0_16 }, [9] = { _x1, _x2, _x2, _x4, _x0_33 }, [12] = { _x1, _x1, _x2, _x4, _x0_33 }, [14] = { _x1, _x3, _x3, _x9, _x0_75 }, [15] = { _x1, _x1_5, _x1_5, _x4_5, _x0_375 }, #define CLOCK_CMODES_PERMITTED_FR405 0xd31f }; static struct clock_cmode __pminitdata clock_cmodes_fr555[16] = { [0] = { _x1, _x2, _x2, _x4, _x0_33 }, [1] = { _x1, _x3, _x3, _x6, _x0_5 }, [2] = { _x1, _x2, _x4, _x8, _x0_66 }, [3] = { _x1, _x1_5, _x3, _x6, _x0_5 }, [4] = { _x1, _x3, _x3, _x9, _x0_75 }, [5] = { _x1, _x2, _x2, _x6, _x0_5 }, [6] = { _x1, _x1_5, _x1_5, _x4_5, _x0_375 }, }; static const struct clock_cmode __pminitconst *clock_cmodes; static int __pminitdata clock_doubled; static struct uart_port __pminitdata __frv_uart0 = { .uartclk = 0, .membase = (char *) UART0_BASE, .irq = IRQ_CPU_UART0, .regshift = 3, .iotype = UPIO_MEM, .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, }; static struct uart_port __pminitdata __frv_uart1 = { .uartclk = 0, .membase = (char *) UART1_BASE, .irq = IRQ_CPU_UART1, .regshift = 3, .iotype = UPIO_MEM, .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, }; #if 0 static void __init printk_xampr(unsigned long ampr, unsigned long amlr, char i_d, int n) { unsigned long phys, virt, cxn, size; #ifdef CONFIG_MMU virt = amlr & 0xffffc000; cxn = amlr & 0x3fff; #else virt = ampr & 0xffffc000; cxn = 0; #endif phys = ampr & xAMPRx_PPFN; size = 1 << (((ampr & xAMPRx_SS) >> 4) + 17); printk("%cAMPR%d: va %08lx-%08lx [pa %08lx] %c%c%c%c [cxn:%04lx]\n", i_d, n, virt, virt + size - 1, phys, ampr & xAMPRx_S ? 'S' : '-', ampr & xAMPRx_C ? 'C' : '-', ampr & DAMPRx_WP ? 'W' : '-', ampr & xAMPRx_V ? 'V' : '-', cxn ); } #endif /*****************************************************************************/ /* * dump the memory map */ static void __init dump_memory_map(void) { #if 0 /* dump the protection map */ printk_xampr(__get_IAMPR(0), __get_IAMLR(0), 'I', 0); printk_xampr(__get_IAMPR(1), __get_IAMLR(1), 'I', 1); printk_xampr(__get_IAMPR(2), __get_IAMLR(2), 'I', 2); printk_xampr(__get_IAMPR(3), __get_IAMLR(3), 'I', 3); printk_xampr(__get_IAMPR(4), __get_IAMLR(4), 'I', 4); printk_xampr(__get_IAMPR(5), __get_IAMLR(5), 'I', 5); printk_xampr(__get_IAMPR(6), __get_IAMLR(6), 'I', 6); printk_xampr(__get_IAMPR(7), __get_IAMLR(7), 'I', 7); printk_xampr(__get_IAMPR(8), __get_IAMLR(8), 'I', 8); printk_xampr(__get_IAMPR(9), __get_IAMLR(9), 'i', 9); printk_xampr(__get_IAMPR(10), __get_IAMLR(10), 'I', 10); printk_xampr(__get_IAMPR(11), __get_IAMLR(11), 'I', 11); printk_xampr(__get_IAMPR(12), __get_IAMLR(12), 'I', 12); printk_xampr(__get_IAMPR(13), __get_IAMLR(13), 'I', 13); printk_xampr(__get_IAMPR(14), __get_IAMLR(14), 'I', 14); printk_xampr(__get_IAMPR(15), __get_IAMLR(15), 'I', 15); printk_xampr(__get_DAMPR(0), __get_DAMLR(0), 'D', 0); printk_xampr(__get_DAMPR(1), __get_DAMLR(1), 'D', 1); printk_xampr(__get_DAMPR(2), __get_DAMLR(2), 'D', 2); printk_xampr(__get_DAMPR(3), __get_DAMLR(3), 'D', 3); printk_xampr(__get_DAMPR(4), __get_DAMLR(4), 'D', 4); printk_xampr(__get_DAMPR(5), __get_DAMLR(5), 'D', 5); printk_xampr(__get_DAMPR(6), __get_DAMLR(6), 'D', 6); printk_xampr(__get_DAMPR(7), __get_DAMLR(7), 'D', 7); printk_xampr(__get_DAMPR(8), __get_DAMLR(8), 'D', 8); printk_xampr(__get_DAMPR(9), __get_DAMLR(9), 'D', 9); printk_xampr(__get_DAMPR(10), __get_DAMLR(10), 'D', 10); printk_xampr(__get_DAMPR(11), __get_DAMLR(11), 'D', 11); printk_xampr(__get_DAMPR(12), __get_DAMLR(12), 'D', 12); printk_xampr(__get_DAMPR(13), __get_DAMLR(13), 'D', 13); printk_xampr(__get_DAMPR(14), __get_DAMLR(14), 'D', 14); printk_xampr(__get_DAMPR(15), __get_DAMLR(15), 'D', 15); #endif #if 0 /* dump the bus controller registers */ printk("LGCR: %08lx\n", __get_LGCR()); printk("Master: %08lx-%08lx CR=%08lx\n", __get_LEMBR(), __get_LEMBR() + __get_LEMAM(), __get_LMAICR()); int loop; for (loop = 1; loop <= 7; loop++) { unsigned long lcr = __get_LCR(loop), lsbr = __get_LSBR(loop); printk("CS#%d: %08lx-%08lx %c%c%c%c%c%c%c%c%c\n", loop, lsbr, lsbr + __get_LSAM(loop), lcr & 0x80000000 ? 'r' : '-', lcr & 0x40000000 ? 'w' : '-', lcr & 0x08000000 ? 'b' : '-', lcr & 0x04000000 ? 'B' : '-', lcr & 0x02000000 ? 'C' : '-', lcr & 0x01000000 ? 'D' : '-', lcr & 0x00800000 ? 'W' : '-', lcr & 0x00400000 ? 'R' : '-', (lcr & 0x00030000) == 0x00000000 ? '4' : (lcr & 0x00030000) == 0x00010000 ? '2' : (lcr & 0x00030000) == 0x00020000 ? '1' : '-' ); } #endif #if 0 printk("\n"); #endif } /* end dump_memory_map() */ /*****************************************************************************/ /* * attempt to detect a VDK motherboard and DAV daughter board on an MB93091 system */ #ifdef CONFIG_MB93091_VDK static void __init detect_mb93091(void) { #ifdef CONFIG_MB93090_MB00 /* Detect CB70 without motherboard */ if (!(cpu_system == __frv_mb93091_cb70 && ((*(unsigned short *)0xffc00030) & 0x100))) { cpu_board1 = __frv_mb93090_mb00; mb93090_mb00_detected = 1; } #endif #ifdef CONFIG_FUJITSU_MB93493 cpu_board2 = __frv_mb93493; #endif } /* end detect_mb93091() */ #endif /*****************************************************************************/ /* * determine the CPU type and set appropriate parameters * * Family Series CPU Core Silicon Imple Vers * ---------------------------------------------------------- * FR-V --+-> FR400 --+-> FR401 --+-> MB93401 02 00 [1] * | | | * | | +-> MB93401/A 02 01 * | | | * | | +-> MB93403 02 02 * | | * | +-> FR405 ----> MB93405 04 00 * | * +-> FR450 ----> FR451 ----> MB93451 05 00 * | * +-> FR500 ----> FR501 --+-> MB93501 01 01 [2] * | | * | +-> MB93501/A 01 02 * | * +-> FR550 --+-> FR551 ----> MB93555 03 01 * * [1] The MB93401 is an obsolete CPU replaced by the MB93401A * [2] The MB93501 is an obsolete CPU replaced by the MB93501A * * Imple is PSR(Processor Status Register)[31:28]. * Vers is PSR(Processor Status Register)[27:24]. * * A "Silicon" consists of CPU core and some on-chip peripherals. */ static void __init determine_cpu(void) { unsigned long hsr0 = __get_HSR(0); unsigned long psr = __get_PSR(); /* work out what selectable services the CPU supports */ __set_PSR(psr | PSR_EM | PSR_EF | PSR_CM | PSR_NEM); cpu_psr_all = __get_PSR(); __set_PSR(psr); __set_HSR(0, hsr0 | HSR0_GRLE | HSR0_GRHE | HSR0_FRLE | HSR0_FRHE); cpu_hsr0_all = __get_HSR(0); __set_HSR(0, hsr0); /* derive other service specs from the CPU type */ cpu_series = "unknown"; cpu_core = "unknown"; cpu_silicon = "unknown"; cpu_mmu = "Prot"; cpu_system = __frv_unknown_system; clock_cmodes = NULL; clock_doubled = 0; #ifdef CONFIG_PM clock_bits_settable = CLOCK_BIT_CM_H | CLOCK_BIT_CM_M | CLOCK_BIT_P0; #endif switch (PSR_IMPLE(psr)) { case PSR_IMPLE_FR401: cpu_series = "fr400"; cpu_core = "fr401"; pdm_suspend_mode = HSR0_PDM_PLL_RUN; switch (PSR_VERSION(psr)) { case PSR_VERSION_FR401_MB93401: cpu_silicon = "mb93401"; cpu_system = __frv_mb93091_cb10; clock_cmodes = clock_cmodes_fr401_fr403; clock_doubled = 1; break; case PSR_VERSION_FR401_MB93401A: cpu_silicon = "mb93401/A"; cpu_system = __frv_mb93091_cb11; clock_cmodes = clock_cmodes_fr401_fr403; break; case PSR_VERSION_FR401_MB93403: cpu_silicon = "mb93403"; #ifndef CONFIG_MB93093_PDK cpu_system = __frv_mb93091_cb30; #else cpu_system = __frv_mb93093; #endif clock_cmodes = clock_cmodes_fr401_fr403; break; default: break; } break; case PSR_IMPLE_FR405: cpu_series = "fr400"; cpu_core = "fr405"; pdm_suspend_mode = HSR0_PDM_PLL_STOP; switch (PSR_VERSION(psr)) { case PSR_VERSION_FR405_MB93405: cpu_silicon = "mb93405"; cpu_system = __frv_mb93091_cb60; clock_cmodes = clock_cmodes_fr405; #ifdef CONFIG_PM clock_bits_settable |= CLOCK_BIT_CMODE; clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405; #endif /* the FPGA on the CB70 has extra registers * - it has 0x0046 in the VDK_ID FPGA register at 0x1a0, which is * how we tell the difference between it and a CB60 */ if (*(volatile unsigned short *) 0xffc001a0 == 0x0046) cpu_system = __frv_mb93091_cb70; break; default: break; } break; case PSR_IMPLE_FR451: cpu_series = "fr450"; cpu_core = "fr451"; pdm_suspend_mode = HSR0_PDM_PLL_STOP; #ifdef CONFIG_PM clock_bits_settable |= CLOCK_BIT_CMODE; clock_cmodes_permitted = CLOCK_CMODES_PERMITTED_FR405; #endif switch (PSR_VERSION(psr)) { case PSR_VERSION_FR451_MB93451: cpu_silicon = "mb93451"; cpu_mmu = "Prot, SAT, xSAT, DAT"; cpu_system = __frv_mb93091_cb451; clock_cmodes = clock_cmodes_fr405; break; default: break; } break; case PSR_IMPLE_FR501: cpu_series = "fr500"; cpu_core = "fr501"; pdm_suspend_mode = HSR0_PDM_PLL_STOP; switch (PSR_VERSION(psr)) { case PSR_VERSION_FR501_MB93501: cpu_silicon = "mb93501"; break; case PSR_VERSION_FR501_MB93501A: cpu_silicon = "mb93501/A"; break; default: break; } break; case PSR_IMPLE_FR551: cpu_series = "fr550"; cpu_core = "fr551"; pdm_suspend_mode = HSR0_PDM_PLL_RUN; switch (PSR_VERSION(psr)) { case PSR_VERSION_FR551_MB93555: cpu_silicon = "mb93555"; cpu_mmu = "Prot, SAT"; cpu_system = __frv_mb93091_cb41; clock_cmodes = clock_cmodes_fr555; clock_doubled = 1; break; default: break; } break; default: break; } printk("- Series:%s CPU:%s Silicon:%s\n", cpu_series, cpu_core, cpu_silicon); #ifdef CONFIG_MB93091_VDK detect_mb93091(); #endif #if defined(CONFIG_MB93093_PDK) && defined(CONFIG_FUJITSU_MB93493) cpu_board2 = __frv_mb93493; #endif } /* end determine_cpu() */ /*****************************************************************************/ /* * calculate the bus clock speed */ void __pminit determine_clocks(int verbose) { const struct clock_cmode *mode, *tmode; unsigned long clkc, psr, quot; clkc = __get_CLKC(); psr = __get_PSR(); clock_p0_current = !!(clkc & CLKC_P0); clock_cm_current = clkc & CLKC_CM; clock_cmode_current = (clkc & CLKC_CMODE) >> CLKC_CMODE_s; if (verbose) printk("psr=%08lx hsr0=%08lx clkc=%08lx\n", psr, __get_HSR(0), clkc); /* the CB70 has some alternative ways of setting the clock speed through switches accessed * through the FPGA. */ if (cpu_system == __frv_mb93091_cb70) { unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL; if (clkswr & 0x1000) __clkin_clock_speed_HZ = 60000000UL; else __clkin_clock_speed_HZ = ((clkswr >> 8) & 0xf) * 10000000 + ((clkswr >> 4) & 0xf) * 1000000 + ((clkswr ) & 0xf) * 100000; } /* the FR451 is currently fixed at 24MHz */ else if (cpu_system == __frv_mb93091_cb451) { //__clkin_clock_speed_HZ = 24000000UL; // CB451-FPGA unsigned short clkswr = *(volatile unsigned short *) 0xffc00104UL & 0x1fffUL; if (clkswr & 0x1000) __clkin_clock_speed_HZ = 60000000UL; else __clkin_clock_speed_HZ = ((clkswr >> 8) & 0xf) * 10000000 + ((clkswr >> 4) & 0xf) * 1000000 + ((clkswr ) & 0xf) * 100000; } /* otherwise determine the clockspeed from VDK or other registers */ else { __clkin_clock_speed_HZ = __get_CLKIN(); } /* look up the appropriate clock relationships table entry */ mode = &undef_clock_cmode; if (clock_cmodes) { tmode = &clock_cmodes[(clkc & CLKC_CMODE) >> CLKC_CMODE_s]; if (tmode->xbus) mode = tmode; } #define CLOCK(SRC,RATIO) ((SRC) * (((RATIO) >> 4) & 0x0f) / ((RATIO) & 0x0f)) if (clock_doubled) __clkin_clock_speed_HZ <<= 1; __ext_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->xbus); __sdram_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram); __dsu_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->dsu); switch (clkc & CLKC_CM) { case 0: /* High */ __core_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->corebus); __core_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->core); break; case 1: /* Medium */ __core_bus_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram); __core_clock_speed_HZ = CLOCK(__clkin_clock_speed_HZ, mode->sdram); break; case 2: /* Low; not supported */ case 3: /* UNDEF */ printk("Unsupported CLKC CM %ld\n", clkc & CLKC_CM); panic("Bye"); } __res_bus_clock_speed_HZ = __ext_bus_clock_speed_HZ; if (clkc & CLKC_P0) __res_bus_clock_speed_HZ >>= 1; if (verbose) { printk("CLKIN: %lu.%3.3luMHz\n", __clkin_clock_speed_HZ / 1000000, (__clkin_clock_speed_HZ / 1000) % 1000); printk("CLKS:" " ext=%luMHz res=%luMHz sdram=%luMHz cbus=%luMHz core=%luMHz dsu=%luMHz\n", __ext_bus_clock_speed_HZ / 1000000, __res_bus_clock_speed_HZ / 1000000, __sdram_clock_speed_HZ / 1000000, __core_bus_clock_speed_HZ / 1000000, __core_clock_speed_HZ / 1000000, __dsu_clock_speed_HZ / 1000000 ); } /* calculate the number of __delay() loop iterations per sec (2 insn loop) */ __delay_loops_MHz = __core_clock_speed_HZ / (1000000 * 2); /* set the serial prescaler */ __serial_clock_speed_HZ = __res_bus_clock_speed_HZ; quot = 1; while (__serial_clock_speed_HZ / quot / 16 / 65536 > 3000) quot += 1; /* double the divisor if P0 is clear, so that if/when P0 is set, it's still achievable * - we have to be careful - dividing too much can mean we can't get 115200 baud */ if (__serial_clock_speed_HZ > 32000000 && !(clkc & CLKC_P0)) quot <<= 1; __serial_clock_speed_HZ /= quot; __frv_uart0.uartclk = __serial_clock_speed_HZ; __frv_uart1.uartclk = __serial_clock_speed_HZ; if (verbose) printk(" uart=%luMHz\n", __serial_clock_speed_HZ / 1000000 * quot); while (!(__get_UART0_LSR() & UART_LSR_TEMT)) continue; while (!(__get_UART1_LSR() & UART_LSR_TEMT)) continue; __set_UCPVR(quot); __set_UCPSR(0); } /* end determine_clocks() */ /*****************************************************************************/ /* * reserve some DMA consistent memory */ #ifdef CONFIG_RESERVE_DMA_COHERENT static void __init reserve_dma_coherent(void) { unsigned long ampr; /* find the first non-kernel memory tile and steal it */ #define __steal_AMPR(r) \ if (__get_DAMPR(r) & xAMPRx_V) { \ ampr = __get_DAMPR(r); \ __set_DAMPR(r, ampr | xAMPRx_S | xAMPRx_C); \ __set_IAMPR(r, 0); \ goto found; \ } __steal_AMPR(1); __steal_AMPR(2); __steal_AMPR(3); __steal_AMPR(4); __steal_AMPR(5); __steal_AMPR(6); if (PSR_IMPLE(__get_PSR()) == PSR_IMPLE_FR551) { __steal_AMPR(7); __steal_AMPR(8); __steal_AMPR(9); __steal_AMPR(10); __steal_AMPR(11); __steal_AMPR(12); __steal_AMPR(13); __steal_AMPR(14); } /* unable to grant any DMA consistent memory */ printk("No DMA consistent memory reserved\n"); return; found: dma_coherent_mem_start = ampr & xAMPRx_PPFN; ampr &= xAMPRx_SS; ampr >>= 4; ampr = 1 << (ampr - 3 + 20); dma_coherent_mem_end = dma_coherent_mem_start + ampr; printk("DMA consistent memory reserved %lx-%lx\n", dma_coherent_mem_start, dma_coherent_mem_end); } /* end reserve_dma_coherent() */ #endif /*****************************************************************************/ /* * calibrate the delay loop */ void __cpuinit calibrate_delay(void) { loops_per_jiffy = __delay_loops_MHz * (1000000 / HZ); printk("Calibrating delay loop... %lu.%02lu BogoMIPS\n", loops_per_jiffy / (500000 / HZ), (loops_per_jiffy / (5000 / HZ)) % 100); } /* end calibrate_delay() */ /*****************************************************************************/ /* * look through the command line for some things we need to know immediately */ static void __init parse_cmdline_early(char *cmdline) { if (!cmdline) return; while (*cmdline) { if (*cmdline == ' ') cmdline++; /* "mem=XXX[kKmM]" sets SDRAM size to , overriding the value we worked * out from the SDRAM controller mask register */ if (!memcmp(cmdline, "mem=", 4)) { unsigned long long mem_size; mem_size = memparse(cmdline + 4, &cmdline); memory_end = memory_start + mem_size; } while (*cmdline && *cmdline != ' ') cmdline++; } } /* end parse_cmdline_early() */ /*****************************************************************************/ /* * */ void __init setup_arch(char **cmdline_p) { #ifdef CONFIG_MMU printk("Linux FR-V port done by Red Hat Inc \n"); #else printk("uClinux FR-V port done by Red Hat Inc \n"); #endif memcpy(boot_command_line, redboot_command_line, COMMAND_LINE_SIZE); determine_cpu(); determine_clocks(1); /* For printk-directly-beats-on-serial-hardware hack */ console_set_baud(115200); #ifdef CONFIG_GDBSTUB gdbstub_set_baud(115200); #endif #ifdef CONFIG_RESERVE_DMA_COHERENT reserve_dma_coherent(); #endif dump_memory_map(); #ifdef CONFIG_MB93090_MB00 if (mb93090_mb00_detected) mb93090_display(); #endif /* register those serial ports that are available */ #ifdef CONFIG_FRV_ONCPU_SERIAL #ifndef CONFIG_GDBSTUB_UART0 __reg(UART0_BASE + UART_IER * 8) = 0; early_serial_setup(&__frv_uart0); #endif #ifndef CONFIG_GDBSTUB_UART1 __reg(UART1_BASE + UART_IER * 8) = 0; early_serial_setup(&__frv_uart1); #endif #endif /* deal with the command line - RedBoot may have passed one to the kernel */ memcpy(command_line, boot_command_line, sizeof(command_line)); *cmdline_p = &command_line[0]; parse_cmdline_early(command_line); /* set up the memory description * - by now the stack is part of the init task */ printk("Memory %08lx-%08lx\n", memory_start, memory_end); BUG_ON(memory_start == memory_end); init_mm.start_code = (unsigned long) _stext; init_mm.end_code = (unsigned long) _etext; init_mm.end_data = (unsigned long) _edata; #if 0 /* DAVIDM - don't set brk just incase someone decides to use it */ init_mm.brk = (unsigned long) &_end; #else init_mm.brk = (unsigned long) 0; #endif #ifdef DEBUG printk("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n", _stext, _etext, _sdata, _edata, __bss_start, __bss_stop); #endif #ifdef CONFIG_VT #if defined(CONFIG_VGA_CONSOLE) conswitchp = &vga_con; #elif defined(CONFIG_DUMMY_CONSOLE) conswitchp = &dummy_con; #endif #endif #ifdef CONFIG_MMU setup_linux_memory(); #else setup_uclinux_memory(); #endif /* get kmalloc into gear */ paging_init(); /* init DMA */ frv_dma_init(); #ifdef DEBUG printk("Done setup_arch\n"); #endif /* start the decrement timer running */ // asm volatile("movgs %0,timerd" :: "r"(10000000)); // __set_HSR(0, __get_HSR(0) | HSR0_ETMD); } /* end setup_arch() */ #if 0 /*****************************************************************************/ /* * */ static int setup_arch_serial(void) { /* register those serial ports that are available */ #ifndef CONFIG_GDBSTUB_UART0 early_serial_setup(&__frv_uart0); #endif #ifndef CONFIG_GDBSTUB_UART1 early_serial_setup(&__frv_uart1); #endif return 0; } /* end setup_arch_serial() */ late_initcall(setup_arch_serial); #endif /*****************************************************************************/ /* * set up the memory map for normal MMU linux */ #ifdef CONFIG_MMU static void __init setup_linux_memory(void) { unsigned long bootmap_size, low_top_pfn, kstart, kend, high_mem; unsigned long physpages; kstart = (unsigned long) &__kernel_image_start - PAGE_OFFSET; kend = (unsigned long) &__kernel_image_end - PAGE_OFFSET; kstart = kstart & PAGE_MASK; kend = (kend + PAGE_SIZE - 1) & PAGE_MASK; /* give all the memory to the bootmap allocator, tell it to put the * boot mem_map immediately following the kernel image */ bootmap_size = init_bootmem_node(NODE_DATA(0), kend >> PAGE_SHIFT, /* map addr */ memory_start >> PAGE_SHIFT, /* start of RAM */ memory_end >> PAGE_SHIFT /* end of RAM */ ); /* pass the memory that the kernel can immediately use over to the bootmem allocator */ max_mapnr = physpages = (memory_end - memory_start) >> PAGE_SHIFT; low_top_pfn = (KERNEL_LOWMEM_END - KERNEL_LOWMEM_START) >> PAGE_SHIFT; high_mem = 0; if (physpages > low_top_pfn) { #ifdef CONFIG_HIGHMEM high_mem = physpages - low_top_pfn; #else max_mapnr = physpages = low_top_pfn; #endif } else { low_top_pfn = physpages; } min_low_pfn = memory_start >> PAGE_SHIFT; max_low_pfn = low_top_pfn; max_pfn = memory_end >> PAGE_SHIFT; num_mappedpages = low_top_pfn; printk(KERN_NOTICE "%ldMB LOWMEM available.\n", low_top_pfn >> (20 - PAGE_SHIFT)); free_bootmem(memory_start, low_top_pfn << PAGE_SHIFT); #ifdef CONFIG_HIGHMEM if (high_mem) printk(KERN_NOTICE "%ldMB HIGHMEM available.\n", high_mem >> (20 - PAGE_SHIFT)); #endif /* take back the memory occupied by the kernel image and the bootmem alloc map */ reserve_bootmem(kstart, kend - kstart + bootmap_size, BOOTMEM_DEFAULT); /* reserve the memory occupied by the initial ramdisk */ #ifdef CONFIG_BLK_DEV_INITRD if (LOADER_TYPE && INITRD_START) { if (INITRD_START + INITRD_SIZE <= (low_top_pfn << PAGE_SHIFT)) { reserve_bootmem(INITRD_START, INITRD_SIZE, BOOTMEM_DEFAULT); initrd_start = INITRD_START + PAGE_OFFSET; initrd_end = initrd_start + INITRD_SIZE; } else { printk(KERN_ERR "initrd extends beyond end of memory (0x%08lx > 0x%08lx)\n" "disabling initrd\n", INITRD_START + INITRD_SIZE, low_top_pfn << PAGE_SHIFT); initrd_start = 0; } } #endif } /* end setup_linux_memory() */ #endif /*****************************************************************************/ /* * set up the memory map for uClinux */ #ifndef CONFIG_MMU static void __init setup_uclinux_memory(void) { #ifdef CONFIG_PROTECT_KERNEL unsigned long dampr; #endif unsigned long kend; int bootmap_size; kend = (unsigned long) &__kernel_image_end; kend = (kend + PAGE_SIZE - 1) & PAGE_MASK; /* give all the memory to the bootmap allocator, tell it to put the * boot mem_map immediately following the kernel image */ bootmap_size = init_bootmem_node(NODE_DATA(0), kend >> PAGE_SHIFT, /* map addr */ memory_start >> PAGE_SHIFT, /* start of RAM */ memory_end >> PAGE_SHIFT /* end of RAM */ ); /* free all the usable memory */ free_bootmem(memory_start, memory_end - memory_start); high_memory = (void *) (memory_end & PAGE_MASK); max_mapnr = ((unsigned long) high_memory - PAGE_OFFSET) >> PAGE_SHIFT; min_low_pfn = memory_start >> PAGE_SHIFT; max_low_pfn = memory_end >> PAGE_SHIFT; max_pfn = max_low_pfn; /* now take back the bits the core kernel is occupying */ #ifndef CONFIG_PROTECT_KERNEL reserve_bootmem(kend, bootmap_size, BOOTMEM_DEFAULT); reserve_bootmem((unsigned long) &__kernel_image_start, kend - (unsigned long) &__kernel_image_start, BOOTMEM_DEFAULT); #else dampr = __get_DAMPR(0); dampr &= xAMPRx_SS; dampr = (dampr >> 4) + 17; dampr = 1 << dampr; reserve_bootmem(__get_DAMPR(0) & xAMPRx_PPFN, dampr, BOOTMEM_DEFAULT); #endif /* reserve some memory to do uncached DMA through if requested */ #ifdef CONFIG_RESERVE_DMA_COHERENT if (dma_coherent_mem_start) reserve_bootmem(dma_coherent_mem_start, dma_coherent_mem_end - dma_coherent_mem_start, BOOTMEM_DEFAULT); #endif } /* end setup_uclinux_memory() */ #endif /*****************************************************************************/ /* * get CPU information for use by procfs */ static int show_cpuinfo(struct seq_file *m, void *v) { const char *gr, *fr, *fm, *fp, *cm, *nem, *ble; #ifdef CONFIG_PM const char *sep; #endif gr = cpu_hsr0_all & HSR0_GRHE ? "gr0-63" : "gr0-31"; fr = cpu_hsr0_all & HSR0_FRHE ? "fr0-63" : "fr0-31"; fm = cpu_psr_all & PSR_EM ? ", Media" : ""; fp = cpu_psr_all & PSR_EF ? ", FPU" : ""; cm = cpu_psr_all & PSR_CM ? ", CCCR" : ""; nem = cpu_psr_all & PSR_NEM ? ", NE" : ""; ble = cpu_psr_all & PSR_BE ? "BE" : "LE"; seq_printf(m, "CPU-Series:\t%s\n" "CPU-Core:\t%s, %s, %s%s%s\n" "CPU:\t\t%s\n" "MMU:\t\t%s\n" "FP-Media:\t%s%s%s\n" "System:\t\t%s", cpu_series, cpu_core, gr, ble, cm, nem, cpu_silicon, cpu_mmu, fr, fm, fp, cpu_system); if (cpu_board1) seq_printf(m, ", %s", cpu_board1); if (cpu_board2) seq_printf(m, ", %s", cpu_board2); seq_printf(m, "\n"); #ifdef CONFIG_PM seq_printf(m, "PM-Controls:"); sep = "\t"; if (clock_bits_settable & CLOCK_BIT_CMODE) { seq_printf(m, "%scmode=0x%04hx", sep, clock_cmodes_permitted); sep = ", "; } if (clock_bits_settable & CLOCK_BIT_CM) { seq_printf(m, "%scm=0x%lx", sep, clock_bits_settable & CLOCK_BIT_CM); sep = ", "; } if (clock_bits_settable & CLOCK_BIT_P0) { seq_printf(m, "%sp0=0x3", sep); sep = ", "; } seq_printf(m, "%ssuspend=0x22\n", sep); #endif seq_printf(m, "PM-Status:\tcmode=%d, cm=%d, p0=%d\n", clock_cmode_current, clock_cm_current, clock_p0_current); #define print_clk(TAG, VAR) \ seq_printf(m, "Clock-" TAG ":\t%lu.%2.2lu MHz\n", VAR / 1000000, (VAR / 10000) % 100) print_clk("In", __clkin_clock_speed_HZ); print_clk("Core", __core_clock_speed_HZ); print_clk("SDRAM", __sdram_clock_speed_HZ); print_clk("CBus", __core_bus_clock_speed_HZ); print_clk("Res", __res_bus_clock_speed_HZ); print_clk("Ext", __ext_bus_clock_speed_HZ); print_clk("DSU", __dsu_clock_speed_HZ); seq_printf(m, "BogoMips:\t%lu.%02lu\n", (loops_per_jiffy * HZ) / 500000, ((loops_per_jiffy * HZ) / 5000) % 100); return 0; } /* end show_cpuinfo() */ static void *c_start(struct seq_file *m, loff_t *pos) { return *pos < NR_CPUS ? (void *) 0x12345678 : NULL; } static void *c_next(struct seq_file *m, void *v, loff_t *pos) { ++*pos; return c_start(m, pos); } static void c_stop(struct seq_file *m, void *v) { } const struct seq_operations cpuinfo_op = { .start = c_start, .next = c_next, .stop = c_stop, .show = show_cpuinfo, }; void arch_gettod(int *year, int *mon, int *day, int *hour, int *min, int *sec) { *year = *mon = *day = *hour = *min = *sec = 0; } /*****************************************************************************/ /* * */ #ifdef CONFIG_MB93090_MB00 static void __init mb93090_sendlcdcmd(uint32_t cmd) { unsigned long base = __addr_LCD(); int loop; /* request reading of the busy flag */ __set_LCD(base, LCD_CMD_READ_BUSY); __set_LCD(base, LCD_CMD_READ_BUSY & ~LCD_E); /* wait for the busy flag to become clear */ for (loop = 10000; loop > 0; loop--) if (!(__get_LCD(base) & 0x80)) break; /* send the command */ __set_LCD(base, cmd); __set_LCD(base, cmd & ~LCD_E); } /* end mb93090_sendlcdcmd() */ /*****************************************************************************/ /* * write to the MB93090 LEDs and LCD */ static void __init mb93090_display(void) { const char *p; __set_LEDS(0); /* set up the LCD */ mb93090_sendlcdcmd(LCD_CMD_CLEAR); mb93090_sendlcdcmd(LCD_CMD_FUNCSET(1,1,0)); mb93090_sendlcdcmd(LCD_CMD_ON(0,0)); mb93090_sendlcdcmd(LCD_CMD_HOME); mb93090_sendlcdcmd(LCD_CMD_SET_DD_ADDR(0)); for (p = mb93090_banner; *p; p++) mb93090_sendlcdcmd(LCD_DATA_WRITE(*p)); mb93090_sendlcdcmd(LCD_CMD_SET_DD_ADDR(64)); for (p = mb93090_version; *p; p++) mb93090_sendlcdcmd(LCD_DATA_WRITE(*p)); } /* end mb93090_display() */ #endif // CONFIG_MB93090_MB00