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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/powerpc/boot/treeboot-walnut.c | |
parent | Initial commit. (diff) | |
download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/powerpc/boot/treeboot-walnut.c')
-rw-r--r-- | arch/powerpc/boot/treeboot-walnut.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/arch/powerpc/boot/treeboot-walnut.c b/arch/powerpc/boot/treeboot-walnut.c new file mode 100644 index 000000000..097974e59 --- /dev/null +++ b/arch/powerpc/boot/treeboot-walnut.c @@ -0,0 +1,84 @@ +/* + * Old U-boot compatibility for Walnut + * + * Author: Josh Boyer <jwboyer@linux.vnet.ibm.com> + * + * Copyright 2007 IBM Corporation + * Based on cuboot-83xx.c, which is: + * Copyright (c) 2007 Freescale Semiconductor, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + +#include "ops.h" +#include "stdio.h" +#include "dcr.h" +#include "4xx.h" +#include "io.h" + +BSS_STACK(4096); + +static void walnut_flashsel_fixup(void) +{ + void *devp, *sram; + u32 reg_flash[3] = {0x0, 0x0, 0x80000}; + u32 reg_sram[3] = {0x0, 0x0, 0x80000}; + u8 *fpga; + u8 fpga_brds1 = 0x0; + + devp = finddevice("/plb/ebc/fpga"); + if (!devp) + fatal("Couldn't locate FPGA node\n\r"); + + if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga)) + fatal("no virtual-reg property\n\r"); + + fpga_brds1 = in_8(fpga); + + devp = finddevice("/plb/ebc/flash"); + if (!devp) + fatal("Couldn't locate flash node\n\r"); + + if (getprop(devp, "reg", reg_flash, sizeof(reg_flash)) != sizeof(reg_flash)) + fatal("flash reg property has unexpected size\n\r"); + + sram = finddevice("/plb/ebc/sram"); + if (!sram) + fatal("Couldn't locate sram node\n\r"); + + if (getprop(sram, "reg", reg_sram, sizeof(reg_sram)) != sizeof(reg_sram)) + fatal("sram reg property has unexpected size\n\r"); + + if (fpga_brds1 & 0x1) { + reg_flash[1] ^= 0x80000; + reg_sram[1] ^= 0x80000; + } + + setprop(devp, "reg", reg_flash, sizeof(reg_flash)); + setprop(sram, "reg", reg_sram, sizeof(reg_sram)); +} + +#define WALNUT_OPENBIOS_MAC_OFF 0xfffffe0b +static void walnut_fixups(void) +{ + ibm4xx_sdram_fixup_memsize(); + ibm405gp_fixup_clocks(33330000, 0xa8c000); + ibm4xx_quiesce_eth((u32 *)0xef600800, NULL); + ibm4xx_fixup_ebc_ranges("/plb/ebc"); + walnut_flashsel_fixup(); + dt_fixup_mac_address_by_alias("ethernet0", (u8 *) WALNUT_OPENBIOS_MAC_OFF); +} + +void platform_init(void) +{ + unsigned long end_of_ram = 0x2000000; + unsigned long avail_ram = end_of_ram - (unsigned long) _end; + + simple_alloc_init(_end, avail_ram, 32, 32); + platform_ops.fixups = walnut_fixups; + platform_ops.exit = ibm40x_dbcr_reset; + fdt_init(_dtb_start); + serial_console_init(); +} |