1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr> 7 */ 8 9 #include <linux/init.h> 10 #include <linux/memblock.h> 11 #include <linux/smp.h> 12 #include <asm/bootinfo.h> 13 #include <asm/bmips.h> 14 #include <asm/smp-ops.h> 15 #include <asm/mipsregs.h> 16 #include <bcm63xx_board.h> 17 #include <bcm63xx_cpu.h> 18 #include <bcm63xx_io.h> 19 #include <bcm63xx_regs.h> 20 21 void __init prom_init(void) 22 { 23 u32 reg, mask; 24 25 bcm63xx_cpu_init(); 26 27 /* stop any running watchdog */ 28 bcm_wdt_writel(WDT_STOP_1, WDT_CTL_REG); 29 bcm_wdt_writel(WDT_STOP_2, WDT_CTL_REG); 30 31 /* disable all hardware blocks clock for now */ 32 if (BCMCPU_IS_3368()) 33 mask = CKCTL_3368_ALL_SAFE_EN; 34 else if (BCMCPU_IS_6328()) 35 mask = CKCTL_6328_ALL_SAFE_EN; 36 else if (BCMCPU_IS_6338()) 37 mask = CKCTL_6338_ALL_SAFE_EN; 38 else if (BCMCPU_IS_6345()) 39 mask = CKCTL_6345_ALL_SAFE_EN; 40 else if (BCMCPU_IS_6348()) 41 mask = CKCTL_6348_ALL_SAFE_EN; 42 else if (BCMCPU_IS_6358()) 43 mask = CKCTL_6358_ALL_SAFE_EN; 44 else if (BCMCPU_IS_6362()) 45 mask = CKCTL_6362_ALL_SAFE_EN; 46 else if (BCMCPU_IS_6368()) 47 mask = CKCTL_6368_ALL_SAFE_EN; 48 else 49 mask = 0; 50 51 reg = bcm_perf_readl(PERF_CKCTL_REG); 52 reg &= ~mask; 53 bcm_perf_writel(reg, PERF_CKCTL_REG); 54 55 /* do low level board init */ 56 board_prom_init(); 57 58 /* set up SMP */ 59 if (!register_bmips_smp_ops()) { 60 /* 61 * BCM6328 might not have its second CPU enabled, while BCM3368 62 * and BCM6358 need special handling for their shared TLB, so 63 * disable SMP for now. 64 */ 65 if (BCMCPU_IS_6328()) { 66 reg = bcm_readl(BCM_6328_OTP_BASE + 67 OTP_USER_BITS_6328_REG(3)); 68 69 if (reg & OTP_6328_REG3_TP1_DISABLED) 70 bmips_smp_enabled = 0; 71 } else if (BCMCPU_IS_3368() || BCMCPU_IS_6358()) { 72 bmips_smp_enabled = 0; 73 } 74 75 if (!bmips_smp_enabled) 76 return; 77 78 /* 79 * The bootloader has set up the CPU1 reset vector at 80 * 0xa000_0200. 81 * This conflicts with the special interrupt vector (IV). 82 * The bootloader has also set up CPU1 to respond to the wrong 83 * IPI interrupt. 84 * Here we will start up CPU1 in the background and ask it to 85 * reconfigure itself then go back to sleep. 86 */ 87 memcpy((void *)0xa0000200, &bmips_smp_movevec, 0x20); 88 __sync(); 89 set_c0_cause(C_SW0); 90 cpumask_set_cpu(1, &bmips_booted_mask); 91 92 /* 93 * FIXME: we really should have some sort of hazard barrier here 94 */ 95 } 96 } 97 98 void __init prom_free_prom_memory(void) 99 { 100 } 101