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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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25078dc1f7
Powerpc has somewhat odd usage where ZONE_DMA is used for all memory on common 64-bit configfs, and ZONE_DMA32 is used for 31-bit schemes. Move to a scheme closer to what other architectures use (and I dare to say the intent of the system): - ZONE_DMA: optionally for memory < 31-bit (64-bit embedded only) - ZONE_NORMAL: everything addressable by the kernel - ZONE_HIGHMEM: memory > 32-bit for 32-bit kernels Also provide information on how ZONE_DMA is used by defining ARCH_ZONE_DMA_BITS. Contains various fixes from Benjamin Herrenschmidt. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/*
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* Paravirt target for a generic QEMU e500 machine
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*
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* This is intended to be a flexible device-tree-driven platform, not fixed
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* to a particular piece of hardware or a particular spec of virtual hardware,
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* beyond the assumption of an e500-family CPU. Some things are still hardcoded
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* here, such as MPIC, but this is a limitation of the current code rather than
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* an interface contract with QEMU.
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*
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* Copyright 2012 Freescale Semiconductor Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/of_fdt.h>
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#include <asm/machdep.h>
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#include <asm/pgtable.h>
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#include <asm/time.h>
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#include <asm/udbg.h>
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#include <asm/mpic.h>
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#include <sysdev/fsl_soc.h>
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#include <sysdev/fsl_pci.h>
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#include "smp.h"
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#include "mpc85xx.h"
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void __init qemu_e500_pic_init(void)
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{
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struct mpic *mpic;
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unsigned int flags = MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU |
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MPIC_ENABLE_COREINT;
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mpic = mpic_alloc(NULL, 0, flags, 0, 256, " OpenPIC ");
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BUG_ON(mpic == NULL);
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mpic_init(mpic);
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}
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static void __init qemu_e500_setup_arch(void)
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{
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ppc_md.progress("qemu_e500_setup_arch()", 0);
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fsl_pci_assign_primary();
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swiotlb_detect_4g();
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mpc85xx_smp_init();
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}
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/*
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* Called very early, device-tree isn't unflattened
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*/
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static int __init qemu_e500_probe(void)
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{
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return !!of_machine_is_compatible("fsl,qemu-e500");
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}
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machine_arch_initcall(qemu_e500, mpc85xx_common_publish_devices);
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define_machine(qemu_e500) {
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.name = "QEMU e500",
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.probe = qemu_e500_probe,
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.setup_arch = qemu_e500_setup_arch,
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.init_IRQ = qemu_e500_pic_init,
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#ifdef CONFIG_PCI
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.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
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.pcibios_fixup_phb = fsl_pcibios_fixup_phb,
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#endif
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.get_irq = mpic_get_coreint_irq,
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.calibrate_decr = generic_calibrate_decr,
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.progress = udbg_progress,
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};
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