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setup.c


products/Sources/formale Sprachen/C/Linux/arch/mips/sibyte/sb1250/setup.c

// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation */ #include #include #include #include #include #include #include #include #include #include #include #include unsigned int sb1_pass; unsigned int soc_pass; unsigned int soc_type; EXPORT_SYMBOL(soc_type); unsigned int periph_rev; EXPORT_SYMBOL_GPL(periph_rev); unsigned int zbbus_mhz; EXPORT_SYMBOL(zbbus_mhz); static char *soc_str; static char *pass_str; static unsigned int war_pass; /* XXXKW don't overload PASS defines? */ static int __init setup_bcm1250(void) { int ret = 0; switch (soc_pass) { case K_SYS_REVISION_BCM1250_PASS1: periph_rev = 1; pass_str = "Pass 1"; break; case K_SYS_REVISION_BCM1250_A10: periph_rev = 2; pass_str = "A8/A10"; /* XXXKW different war_pass? */ war_pass = K_SYS_REVISION_BCM1250_PASS2; break; case K_SYS_REVISION_BCM1250_PASS2_2: periph_rev = 2; pass_str = "B1"; break; case K_SYS_REVISION_BCM1250_B2: periph_rev = 2; pass_str = "B2"; war_pass = K_SYS_REVISION_BCM1250_PASS2_2; break; case K_SYS_REVISION_BCM1250_PASS3: periph_rev = 3; pass_str = "C0"; break; case K_SYS_REVISION_BCM1250_C1: periph_rev = 3; pass_str = "C1"; break; default: if (soc_pass < K_SYS_REVISION_BCM1250_PASS2_2) { periph_rev = 2; pass_str = "A0-A6"; war_pass = K_SYS_REVISION_BCM1250_PASS2; } else { printk("Unknown BCM1250 rev %x\n", soc_pass); ret = 1; } break; } return ret; } int sb1250_m3_workaround_needed(void) { switch (soc_type) { case K_SYS_SOC_TYPE_BCM1250: case K_SYS_SOC_TYPE_BCM1250_ALT: case K_SYS_SOC_TYPE_BCM1250_ALT2: case K_SYS_SOC_TYPE_BCM1125: case K_SYS_SOC_TYPE_BCM1125H: return soc_pass < K_SYS_REVISION_BCM1250_C0; default: return 0; } } static int __init setup_bcm112x(void) { int ret = 0; switch (soc_pass) { case 0: /* Early build didn't have revid set */ periph_rev = 3; pass_str = "A1"; war_pass = K_SYS_REVISION_BCM112x_A1; break; case K_SYS_REVISION_BCM112x_A1: periph_rev = 3; pass_str = "A1"; break; case K_SYS_REVISION_BCM112x_A2: periph_rev = 3; pass_str = "A2"; break; case K_SYS_REVISION_BCM112x_A3: periph_rev = 3; pass_str = "A3"; break; case K_SYS_REVISION_BCM112x_A4: periph_rev = 3; pass_str = "A4"; break; case K_SYS_REVISION_BCM112x_B0: periph_rev = 3; pass_str = "B0"; break; default: printk("Unknown %s rev %x\n", soc_str, soc_pass); ret = 1; } return ret; } /* Setup code likely to be common to all SiByte platforms */ static int __init sys_rev_decode(void) { int ret = 0; war_pass = soc_pass; switch (soc_type) { case K_SYS_SOC_TYPE_BCM1250: case K_SYS_SOC_TYPE_BCM1250_ALT: case K_SYS_SOC_TYPE_BCM1250_ALT2: soc_str = "BCM1250"; ret = setup_bcm1250(); break; case K_SYS_SOC_TYPE_BCM1120: soc_str = "BCM1120"; ret = setup_bcm112x(); break; case K_SYS_SOC_TYPE_BCM1125: soc_str = "BCM1125"; ret = setup_bcm112x(); break; case K_SYS_SOC_TYPE_BCM1125H: soc_str = "BCM1125H"; ret = setup_bcm112x(); break; default: printk("Unknown SOC type %x\n", soc_type); ret = 1; break; } return ret; } void __init sb1250_setup(void) { uint64_t sys_rev; int plldiv; int bad_config = 0; sb1_pass = read_c0_prid() & PRID_REV_MASK; sys_rev = __raw_readq(IOADDR(A_SCD_SYSTEM_REVISION)); soc_type = SYS_SOC_TYPE(sys_rev); soc_pass = G_SYS_REVISION(sys_rev); if (sys_rev_decode()) { printk("Restart after failure to identify SiByte chip\n"); machine_restart(NULL); } plldiv = G_SYS_PLL_DIV(__raw_readq(IOADDR(A_SCD_SYSTEM_CFG))); zbbus_mhz = ((plldiv >> 1) * 50) + ((plldiv & 1) * 25); printk("Broadcom SiByte %s %s @ %d MHz (SB1 rev %d)\n", soc_str, pass_str, zbbus_mhz * 2, sb1_pass); printk("Board type: %s\n", get_system_type()); switch (war_pass) { case K_SYS_REVISION_BCM1250_PASS1: printk("@@@@ This is a BCM1250 A0-A2 (Pass 1) board, " "and the kernel doesn't have the proper " "workarounds compiled in. @@@@\n"); bad_config = 1; break; case K_SYS_REVISION_BCM1250_PASS2: /* Pass 2 - easiest as default for now - so many numbers */ #if !defined(CONFIG_SB1_PASS_2_WORKAROUNDS) || \ !defined(CONFIG_SB1_PASS_2_1_WORKAROUNDS) printk("@@@@ This is a BCM1250 A3-A10 board, and the " "kernel doesn't have the proper workarounds " "compiled in. @@@@\n"); bad_config = 1; #endif #ifdef CONFIG_CPU_HAS_PREFETCH printk("@@@@ Prefetches may be enabled in this kernel, " "but are buggy on this board. @@@@\n"); bad_config = 1; #endif break; case K_SYS_REVISION_BCM1250_PASS2_2: #ifndef CONFIG_SB1_PASS_2_WORKAROUNDS printk("@@@@ This is a BCM1250 B1/B2. board, and the " "kernel doesn't have the proper workarounds " "compiled in. @@@@\n"); bad_config = 1; #endif #if defined(CONFIG_SB1_PASS_2_1_WORKAROUNDS) || \ !defined(CONFIG_CPU_HAS_PREFETCH) printk("@@@@ This is a BCM1250 B1/B2, but the kernel is " "conservatively configured for an 'A' stepping. " "@@@@\n"); #endif break; default: break; } if (bad_config) { printk("Invalid configuration for this chip.\n"); machine_restart(NULL); } }

                                                                                                                                                                                                                                                                                                                                                                                                     

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