| Aaron Williams | b2ea818 | 2020-06-30 12:08:56 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* |
| 3 | * Copyright (C) 2020 Stefan Roese <sr@denx.de> |
| 4 | */ |
| 5 | |
| 6 | #include <config.h> |
| 7 | #include <asm-offsets.h> |
| 8 | #include <asm/cacheops.h> |
| 9 | #include <asm/regdef.h> |
| 10 | #include <asm/mipsregs.h> |
| 11 | #include <asm/addrspace.h> |
| 12 | #include <asm/asm.h> |
| Stefan Roese | b352665 | 2020-08-20 07:21:56 +0200 | [diff] [blame^] | 13 | #include <mach/octeon-model.h> |
| 14 | |
| 15 | #define COP0_CVMCTL_REG $9,7 /* Cavium control */ |
| 16 | #define COP0_CVMMEMCTL_REG $11,7 /* Cavium memory control */ |
| 17 | #define COP0_PROC_ID_REG $15,0 |
| Aaron Williams | b2ea818 | 2020-06-30 12:08:56 +0200 | [diff] [blame] | 18 | |
| 19 | .set noreorder |
| 20 | |
| 21 | LEAF(lowlevel_init) |
| Stefan Roese | b352665 | 2020-08-20 07:21:56 +0200 | [diff] [blame^] | 22 | |
| 23 | /* Set LMEMSZ in CVMMEMCTL register */ |
| 24 | dmfc0 a0, COP0_CVMMEMCTL_REG |
| 25 | dins a0, zero, 0, 9 |
| 26 | mfc0 a4, COP0_PROC_ID_REG |
| 27 | li a5, OCTEON_CN63XX_PASS1_0 /* Octeon cn63xx pass1 chip id */ |
| 28 | bgt a5, a4, 2f |
| 29 | ori a0, 0x104 /* setup 4 lines of scratch */ |
| 30 | ori a6, a5, 8 /* Octeon cn63xx pass2 chip id */ |
| 31 | bge a4, a6, 2f |
| 32 | nop |
| 33 | li a6, 4 |
| 34 | ins a0, a6, 11, 4 /* Set WBTHRESH=4 as per Core-14752 errata */ |
| 35 | 2: |
| 36 | dmtc0 a0, COP0_CVMMEMCTL_REG |
| 37 | |
| 38 | /* Set REPUN bit in CVMCTL register */ |
| 39 | dmfc0 a0, COP0_CVMCTL_REG |
| 40 | ori a0, 1<<14 /* enable fixup of unaligned mem access */ |
| 41 | dmtc0 a0, COP0_CVMCTL_REG |
| 42 | |
| Aaron Williams | b2ea818 | 2020-06-30 12:08:56 +0200 | [diff] [blame] | 43 | jr ra |
| 44 | nop |
| 45 | END(lowlevel_init) |
| Stefan Roese | 15ba802 | 2020-06-30 12:33:17 +0200 | [diff] [blame] | 46 | |
| 47 | LEAF(mips_mach_early_init) |
| 48 | |
| 49 | move s0, ra |
| 50 | |
| 51 | bal __dummy |
| 52 | nop |
| 53 | |
| 54 | __dummy: |
| 55 | /* Get the actual address that we are running at */ |
| 56 | PTR_LA a7, __dummy |
| 57 | dsubu t3, ra, a7 /* t3 now has reloc offset */ |
| 58 | |
| 59 | PTR_LA t1, _start |
| 60 | daddu t0, t1, t3 /* t0 now has actual address of _start */ |
| 61 | |
| 62 | /* Calculate end address of copy loop */ |
| 63 | PTR_LA t2, _end |
| 64 | daddiu t2, t2, 0x4000 /* Increase size to include appended DTB */ |
| 65 | daddiu t2, t2, 127 |
| 66 | ins t2, zero, 0, 7 /* Round up to cache line for memcpy */ |
| 67 | |
| 68 | /* Copy ourself to the L2 cache from flash, 32 bytes at a time */ |
| 69 | 1: |
| 70 | ld a0, 0(t0) |
| 71 | ld a1, 8(t0) |
| 72 | ld a2, 16(t0) |
| 73 | ld a3, 24(t0) |
| 74 | sd a0, 0(t1) |
| 75 | sd a1, 8(t1) |
| 76 | sd a2, 16(t1) |
| 77 | sd a3, 24(t1) |
| 78 | addiu t0, 32 |
| 79 | addiu t1, 32 |
| 80 | bne t1, t2, 1b |
| 81 | nop |
| 82 | |
| 83 | sync |
| 84 | |
| 85 | /* |
| 86 | * Return to start.S now running from TEXT_BASE, which points |
| 87 | * to DRAM address space, which effectively is L2 cache now. |
| 88 | * This speeds up the init process extremely, especially the |
| 89 | * DDR init code. |
| 90 | */ |
| 91 | dsubu s0, s0, t3 /* Fixup return address with reloc offset */ |
| 92 | jr.hb s0 /* Jump back with hazard barrier */ |
| 93 | nop |
| 94 | |
| 95 | END(mips_mach_early_init) |
| Stefan Roese | b352665 | 2020-08-20 07:21:56 +0200 | [diff] [blame^] | 96 | |
| 97 | LEAF(nmi_bootvector) |
| 98 | |
| 99 | /* |
| 100 | * From Marvell original bootvector setup |
| 101 | */ |
| 102 | mfc0 k0, CP0_STATUS |
| 103 | /* Enable 64-bit addressing, set ERL (should already be set) */ |
| 104 | ori k0, 0x84 |
| 105 | mtc0 k0, CP0_STATUS |
| 106 | /* Core-14345, clear L1 Dcache virtual tags if the core hit an NMI */ |
| 107 | cache 17, 0($0) |
| 108 | |
| 109 | /* |
| 110 | * Needed for Linux kernel booting, otherwise it hangs while |
| 111 | * zero'ing all of CVMSEG |
| 112 | */ |
| 113 | dmfc0 a0, COP0_CVMMEMCTL_REG |
| 114 | dins a0, zero, 0, 9 |
| 115 | ori a0, 0x104 /* setup 4 lines of scratch */ |
| 116 | dmtc0 a0, COP0_CVMMEMCTL_REG |
| 117 | |
| 118 | /* |
| 119 | * Load parameters and entry point |
| 120 | */ |
| 121 | PTR_LA t9, nmi_handler_para |
| 122 | sync |
| 123 | |
| 124 | ld s0, 0x00(t9) |
| 125 | ld a0, 0x08(t9) |
| 126 | ld a1, 0x10(t9) |
| 127 | ld a2, 0x18(t9) |
| 128 | ld a3, 0x20(t9) |
| 129 | |
| 130 | /* Finally jump to entry point (start kernel etc) */ |
| 131 | j s0 |
| 132 | nop |
| 133 | |
| 134 | END(nmi_bootvector) |
| 135 | |
| 136 | /* |
| 137 | * Add here some space for the NMI parameters (entry point and args) |
| 138 | */ |
| 139 | .globl nmi_handler_para |
| 140 | nmi_handler_para: |
| 141 | .dword 0 // entry-point |
| 142 | .dword 0 // arg0 |
| 143 | .dword 0 // arg1 |
| 144 | .dword 0 // arg2 |
| 145 | .dword 0 // arg3 |