[PATCH v2 1/9] alpha: remove DISCONTIGMEM and NUMA

Mike Rapoport
2021-06-04T06:49:08Z

NUMA is marked broken on alpha for more than 15 years and DISCONTIGMEM was
replaced with SPARSEMEM in v5.11.

Remove both NUMA and DISCONTIGMEM support from alpha.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
---
arch/alpha/Kconfig | 22 ---
arch/alpha/include/asm/machvec.h | 6 -
arch/alpha/include/asm/mmzone.h | 100 --------------
arch/alpha/include/asm/pgtable.h | 4 -
arch/alpha/include/asm/topology.h | 39 ------
arch/alpha/kernel/core_marvel.c | 53 +------
arch/alpha/kernel/core_wildfire.c | 29 +---
arch/alpha/kernel/pci_iommu.c | 29 ----
arch/alpha/kernel/proto.h | 8 --
arch/alpha/kernel/setup.c | 16 ---
arch/alpha/kernel/sys_marvel.c | 5 -
arch/alpha/kernel/sys_wildfire.c | 5 -
arch/alpha/mm/Makefile | 2 -
arch/alpha/mm/init.c | 3 -
arch/alpha/mm/numa.c | 223 ------------------------------
15 files changed, 4 insertions(+), 540 deletions(-)
delete mode 100644 arch/alpha/include/asm/mmzone.h
delete mode 100644 arch/alpha/mm/numa.c

diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 5998106faa60..8954216b9956 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -549,29 +549,12 @@ config NR_CPUS
MARVEL support can handle a maximum of 32 CPUs, all the others
with working support have a maximum of 4 CPUs.

-config ARCH_DISCONTIGMEM_ENABLE
- bool "Discontiguous Memory Support"
- depends on BROKEN
- help
- Say Y to support efficient handling of discontiguous physical memory,
- for architectures which are either NUMA (Non-Uniform Memory Access)
- or have huge holes in the physical address space for other reasons.
- See <file:Documentation/vm/numa.rst> for more.
-
config ARCH_SPARSEMEM_ENABLE
bool "Sparse Memory Support"
help
Say Y to support efficient handling of discontiguous physical memory,
for systems that have huge holes in the physical address space.

-config NUMA
- bool "NUMA Support (EXPERIMENTAL)"
- depends on DISCONTIGMEM && BROKEN
- help
- Say Y to compile the kernel to support NUMA (Non-Uniform Memory
- Access). This option is for configuring high-end multiprocessor
- server machines. If in doubt, say N.
-
config ALPHA_WTINT
bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
default y if ALPHA_QEMU
@@ -596,11 +579,6 @@ config ALPHA_WTINT

If unsure, say N.

-config NODES_SHIFT
- int
- default "7"
- depends on NEED_MULTIPLE_NODES
-
# LARGE_VMALLOC is racy, if you *really* need it then fix it first
config ALPHA_LARGE_VMALLOC
bool
diff --git a/arch/alpha/include/asm/machvec.h b/arch/alpha/include/asm/machvec.h
index a4e96e2bec74..e49fabce7b33 100644
--- a/arch/alpha/include/asm/machvec.h
+++ b/arch/alpha/include/asm/machvec.h
@@ -99,12 +99,6 @@ struct alpha_machine_vector

const char *vector_name;

- /* NUMA information */
- int (*pa_to_nid)(unsigned long);
- int (*cpuid_to_nid)(int);
- unsigned long (*node_mem_start)(int);
- unsigned long (*node_mem_size)(int);
-
/* System specific parameters. */
union {
struct {
diff --git a/arch/alpha/include/asm/mmzone.h b/arch/alpha/include/asm/mmzone.h
deleted file mode 100644
index 86644604d977..000000000000
--- a/arch/alpha/include/asm/mmzone.h
+++ /dev/null
@@ -1,100 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
- * Adapted for the alpha wildfire architecture Jan 2001.
- */
-#ifndef _ASM_MMZONE_H_
-#define _ASM_MMZONE_H_
-
-#ifdef CONFIG_DISCONTIGMEM
-
-#include <asm/smp.h>
-
-/*
- * Following are macros that are specific to this numa platform.
- */
-
-extern pg_data_t node_data[];
-
-#define alpha_pa_to_nid(pa) \
- (alpha_mv.pa_to_nid \
- ? alpha_mv.pa_to_nid(pa) \
- : (0))
-#define node_mem_start(nid) \
- (alpha_mv.node_mem_start \
- ? alpha_mv.node_mem_start(nid) \
- : (0UL))
-#define node_mem_size(nid) \
- (alpha_mv.node_mem_size \
- ? alpha_mv.node_mem_size(nid) \
- : ((nid) ? (0UL) : (~0UL)))
-
-#define pa_to_nid(pa) alpha_pa_to_nid(pa)
-#define NODE_DATA(nid) (&node_data[(nid)])
-
-#define node_localnr(pfn, nid) ((pfn) - NODE_DATA(nid)->node_start_pfn)
-
-#if 1
-#define PLAT_NODE_DATA_LOCALNR(p, n) \
- (((p) >> PAGE_SHIFT) - PLAT_NODE_DATA(n)->gendata.node_start_pfn)
-#else
-static inline unsigned long
-PLAT_NODE_DATA_LOCALNR(unsigned long p, int n)
-{
- unsigned long temp;
- temp = p >> PAGE_SHIFT;
- return temp - PLAT_NODE_DATA(n)->gendata.node_start_pfn;
-}
-#endif
-
-/*
- * Following are macros that each numa implementation must define.
- */
-
-/*
- * Given a kernel address, find the home node of the underlying memory.
- */
-#define kvaddr_to_nid(kaddr) pa_to_nid(__pa(kaddr))
-
-/*
- * Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory
- * and returns the kaddr corresponding to first physical page in the
- * node's mem_map.
- */
-#define LOCAL_BASE_ADDR(kaddr) \
- ((unsigned long)__va(NODE_DATA(kvaddr_to_nid(kaddr))->node_start_pfn \
- << PAGE_SHIFT))
-
-/* XXX: FIXME -- nyc */
-#define kern_addr_valid(kaddr) (0)
-
-#define mk_pte(page, pgprot) \
-({ \
- pte_t pte; \
- unsigned long pfn; \
- \
- pfn = page_to_pfn(page) << 32; \
- pte_val(pte) = pfn | pgprot_val(pgprot); \
- \
- pte; \
-})
-
-#define pte_page(x) \
-({ \
- unsigned long kvirt; \
- struct page * __xx; \
- \
- kvirt = (unsigned long)__va(pte_val(x) >> (32-PAGE_SHIFT)); \
- __xx = virt_to_page(kvirt); \
- \
- __xx; \
-})
-
-#define pfn_to_nid(pfn) pa_to_nid(((u64)(pfn) << PAGE_SHIFT))
-#define pfn_valid(pfn) \
- (((pfn) - node_start_pfn(pfn_to_nid(pfn))) < \
- node_spanned_pages(pfn_to_nid(pfn))) \
-
-#endif /* CONFIG_DISCONTIGMEM */
-
-#endif /* _ASM_MMZONE_H_ */
diff --git a/arch/alpha/include/asm/pgtable.h b/arch/alpha/include/asm/pgtable.h
index 8d856c62e22a..e1757b7cfe3d 100644
--- a/arch/alpha/include/asm/pgtable.h
+++ b/arch/alpha/include/asm/pgtable.h
@@ -206,7 +206,6 @@ extern unsigned long __zero_page(void);
#define page_to_pa(page) (page_to_pfn(page) << PAGE_SHIFT)
#define pte_pfn(pte) (pte_val(pte) >> 32)

-#ifndef CONFIG_DISCONTIGMEM
#define pte_page(pte) pfn_to_page(pte_pfn(pte))
#define mk_pte(page, pgprot) \
({ \
@@ -215,7 +214,6 @@ extern unsigned long __zero_page(void);
pte_val(pte) = (page_to_pfn(page) << 32) | pgprot_val(pgprot); \
pte; \
})
-#endif

extern inline pte_t pfn_pte(unsigned long physpfn, pgprot_t pgprot)
{ pte_t pte; pte_val(pte) = (PHYS_TWIDDLE(physpfn) << 32) | pgprot_val(pgprot); return pte; }
@@ -330,9 +328,7 @@ extern inline pte_t mk_swap_pte(unsigned long type, unsigned long offset)
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })

-#ifndef CONFIG_DISCONTIGMEM
#define kern_addr_valid(addr) (1)
-#endif

#define pte_ERROR(e) \
printk("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e))
diff --git a/arch/alpha/include/asm/topology.h b/arch/alpha/include/asm/topology.h
index 5a77a40567fa..7d393036aa8f 100644
--- a/arch/alpha/include/asm/topology.h
+++ b/arch/alpha/include/asm/topology.h
@@ -7,45 +7,6 @@
#include <linux/numa.h>
#include <asm/machvec.h>

-#ifdef CONFIG_NUMA
-static inline int cpu_to_node(int cpu)
-{
- int node;
-
- if (!alpha_mv.cpuid_to_nid)
- return 0;
-
- node = alpha_mv.cpuid_to_nid(cpu);
-
-#ifdef DEBUG_NUMA
- BUG_ON(node < 0);
-#endif
-
- return node;
-}
-
-extern struct cpumask node_to_cpumask_map[];
-/* FIXME: This is dumb, recalculating every time. But simple. */
-static const struct cpumask *cpumask_of_node(int node)
-{
- int cpu;
-
- if (node = NUMA_NO_NODE)
- return cpu_all_mask;
-
- cpumask_clear(&node_to_cpumask_map[node]);
-
- for_each_online_cpu(cpu) {
- if (cpu_to_node(cpu) = node)
- cpumask_set_cpu(cpu, node_to_cpumask_map[node]);
- }
-
- return &node_to_cpumask_map[node];
-}
-
-#define cpumask_of_pcibus(bus) (cpu_online_mask)
-
-#endif /* !CONFIG_NUMA */
# include <asm-generic/topology.h>

#endif /* _ASM_ALPHA_TOPOLOGY_H */
diff --git a/arch/alpha/kernel/core_marvel.c b/arch/alpha/kernel/core_marvel.c
index 4485b77f8658..1efca79ac83c 100644
--- a/arch/alpha/kernel/core_marvel.c
+++ b/arch/alpha/kernel/core_marvel.c
@@ -287,8 +287,7 @@ io7_init_hose(struct io7 *io7, int port)
/*
* Set up window 0 for scatter-gather 8MB at 8MB.
*/
- hose->sg_isa = iommu_arena_new_node(marvel_cpuid_to_nid(io7->pe),
- hose, 0x00800000, 0x00800000, 0);
+ hose->sg_isa = iommu_arena_new_node(0, hose, 0x00800000, 0x00800000, 0);
hose->sg_isa->align_entry = 8; /* cache line boundary */
csrs->POx_WBASE[0].csr =
hose->sg_isa->dma_base | wbase_m_ena | wbase_m_sg;
@@ -305,8 +304,7 @@ io7_init_hose(struct io7 *io7, int port)
/*
* Set up window 2 for scatter-gather (up-to) 1GB at 3GB.
*/
- hose->sg_pci = iommu_arena_new_node(marvel_cpuid_to_nid(io7->pe),
- hose, 0xc0000000, 0x40000000, 0);
+ hose->sg_pci = iommu_arena_new_node(0, hose, 0xc0000000, 0x40000000, 0);
hose->sg_pci->align_entry = 8; /* cache line boundary */
csrs->POx_WBASE[2].csr =
hose->sg_pci->dma_base | wbase_m_ena | wbase_m_sg;
@@ -843,53 +841,8 @@ EXPORT_SYMBOL(marvel_ioportmap);
EXPORT_SYMBOL(marvel_ioread8);
EXPORT_SYMBOL(marvel_iowrite8);
#endif
-\f
-/*
- * NUMA Support
- */
-/**********
- * FIXME - for now each cpu is a node by itself
- * -- no real support for striped mode
- **********
- */
-int
-marvel_pa_to_nid(unsigned long pa)
-{
- int cpuid;

- if ((pa >> 43) & 1) /* I/O */
- cpuid = (~(pa >> 35) & 0xff);
- else /* mem */
- cpuid = ((pa >> 34) & 0x3) | ((pa >> (37 - 2)) & (0x1f << 2));
-
- return marvel_cpuid_to_nid(cpuid);
-}
-
-int
-marvel_cpuid_to_nid(int cpuid)
-{
- return cpuid;
-}
-
-unsigned long
-marvel_node_mem_start(int nid)
-{
- unsigned long pa;
-
- pa = (nid & 0x3) | ((nid & (0x1f << 2)) << 1);
- pa <<= 34;
-
- return pa;
-}
-
-unsigned long
-marvel_node_mem_size(int nid)
-{
- return 16UL * 1024 * 1024 * 1024; /* 16GB */
-}
-
-\f
-/*
+/*
* AGP GART Support.
*/
#include <linux/agp_backend.h>
diff --git a/arch/alpha/kernel/core_wildfire.c b/arch/alpha/kernel/core_wildfire.c
index e8d3b033018d..3a804b67f9da 100644
--- a/arch/alpha/kernel/core_wildfire.c
+++ b/arch/alpha/kernel/core_wildfire.c
@@ -434,39 +434,12 @@ wildfire_write_config(struct pci_bus *bus, unsigned int devfn, int where,
return PCIBIOS_SUCCESSFUL;
}

-struct pci_ops wildfire_pci_ops =
+struct pci_ops wildfire_pci_ops {
.read = wildfire_read_config,
.write = wildfire_write_config,
};

-\f
-/*
- * NUMA Support
- */
-int wildfire_pa_to_nid(unsigned long pa)
-{
- return pa >> 36;
-}
-
-int wildfire_cpuid_to_nid(int cpuid)
-{
- /* assume 4 CPUs per node */
- return cpuid >> 2;
-}
-
-unsigned long wildfire_node_mem_start(int nid)
-{
- /* 64GB per node */
- return (unsigned long)nid * (64UL * 1024 * 1024 * 1024);
-}
-
-unsigned long wildfire_node_mem_size(int nid)
-{
- /* 64GB per node */
- return 64UL * 1024 * 1024 * 1024;
-}
-
#if DEBUG_DUMP_REGS

static void __init
diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c
index d84b19aa8e9d..35d7b3096d6e 100644
--- a/arch/alpha/kernel/pci_iommu.c
+++ b/arch/alpha/kernel/pci_iommu.c
@@ -71,33 +71,6 @@ iommu_arena_new_node(int nid, struct pci_controller *hose, dma_addr_t base,
if (align < mem_size)
align = mem_size;

-
-#ifdef CONFIG_DISCONTIGMEM
-
- arena = memblock_alloc_node(sizeof(*arena), align, nid);
- if (!NODE_DATA(nid) || !arena) {
- printk("%s: couldn't allocate arena from node %d\n"
- " falling back to system-wide allocation\n",
- __func__, nid);
- arena = memblock_alloc(sizeof(*arena), SMP_CACHE_BYTES);
- if (!arena)
- panic("%s: Failed to allocate %zu bytes\n", __func__,
- sizeof(*arena));
- }
-
- arena->ptes = memblock_alloc_node(sizeof(*arena), align, nid);
- if (!NODE_DATA(nid) || !arena->ptes) {
- printk("%s: couldn't allocate arena ptes from node %d\n"
- " falling back to system-wide allocation\n",
- __func__, nid);
- arena->ptes = memblock_alloc(mem_size, align);
- if (!arena->ptes)
- panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
- __func__, mem_size, align);
- }
-
-#else /* CONFIG_DISCONTIGMEM */
-
arena = memblock_alloc(sizeof(*arena), SMP_CACHE_BYTES);
if (!arena)
panic("%s: Failed to allocate %zu bytes\n", __func__,
@@ -107,8 +80,6 @@ iommu_arena_new_node(int nid, struct pci_controller *hose, dma_addr_t base,
panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
__func__, mem_size, align);

-#endif /* CONFIG_DISCONTIGMEM */
-
spin_lock_init(&arena->lock);
arena->hose = hose;
arena->dma_base = base;
diff --git a/arch/alpha/kernel/proto.h b/arch/alpha/kernel/proto.h
index 701a05090141..5816a31c1b38 100644
--- a/arch/alpha/kernel/proto.h
+++ b/arch/alpha/kernel/proto.h
@@ -49,10 +49,6 @@ extern void marvel_init_arch(void);
extern void marvel_kill_arch(int);
extern void marvel_machine_check(unsigned long, unsigned long);
extern void marvel_pci_tbi(struct pci_controller *, dma_addr_t, dma_addr_t);
-extern int marvel_pa_to_nid(unsigned long);
-extern int marvel_cpuid_to_nid(int);
-extern unsigned long marvel_node_mem_start(int);
-extern unsigned long marvel_node_mem_size(int);
extern struct _alpha_agp_info *marvel_agp_info(void);
struct io7 *marvel_find_io7(int pe);
struct io7 *marvel_next_io7(struct io7 *prev);
@@ -101,10 +97,6 @@ extern void wildfire_init_arch(void);
extern void wildfire_kill_arch(int);
extern void wildfire_machine_check(unsigned long vector, unsigned long la_ptr);
extern void wildfire_pci_tbi(struct pci_controller *, dma_addr_t, dma_addr_t);
-extern int wildfire_pa_to_nid(unsigned long);
-extern int wildfire_cpuid_to_nid(int);
-extern unsigned long wildfire_node_mem_start(int);
-extern unsigned long wildfire_node_mem_size(int);

/* console.c */
#ifdef CONFIG_VGA_HOSE
diff --git a/arch/alpha/kernel/setup.c b/arch/alpha/kernel/setup.c
index 03dda3beb3bd..5f6858e9dc28 100644
--- a/arch/alpha/kernel/setup.c
+++ b/arch/alpha/kernel/setup.c
@@ -79,11 +79,6 @@ int alpha_l3_cacheshape;
unsigned long alpha_verbose_mcheck = CONFIG_VERBOSE_MCHECK_ON;
#endif

-#ifdef CONFIG_NUMA
-struct cpumask node_to_cpumask_map[MAX_NUMNODES] __read_mostly;
-EXPORT_SYMBOL(node_to_cpumask_map);
-#endif
-
/* Which processor we booted from. */
int boot_cpuid;

@@ -305,7 +300,6 @@ move_initrd(unsigned long mem_limit)
}
#endif

-#ifndef CONFIG_DISCONTIGMEM
static void __init
setup_memory(void *kernel_end)
{
@@ -389,9 +383,6 @@ setup_memory(void *kernel_end)
}
#endif /* CONFIG_BLK_DEV_INITRD */
}
-#else
-extern void setup_memory(void *);
-#endif /* !CONFIG_DISCONTIGMEM */

int __init
page_is_ram(unsigned long pfn)
@@ -618,13 +609,6 @@ setup_arch(char **cmdline_p)
"VERBOSE_MCHECK "
#endif

-#ifdef CONFIG_DISCONTIGMEM
- "DISCONTIGMEM "
-#ifdef CONFIG_NUMA
- "NUMA "
-#endif
-#endif
-
#ifdef CONFIG_DEBUG_SPINLOCK
"DEBUG_SPINLOCK "
#endif
diff --git a/arch/alpha/kernel/sys_marvel.c b/arch/alpha/kernel/sys_marvel.c
index 83d6c53d6d4d..1f99b03effc2 100644
--- a/arch/alpha/kernel/sys_marvel.c
+++ b/arch/alpha/kernel/sys_marvel.c
@@ -461,10 +461,5 @@ struct alpha_machine_vector marvel_ev7_mv __initmv = {
.kill_arch = marvel_kill_arch,
.pci_map_irq = marvel_map_irq,
.pci_swizzle = common_swizzle,
-
- .pa_to_nid = marvel_pa_to_nid,
- .cpuid_to_nid = marvel_cpuid_to_nid,
- .node_mem_start = marvel_node_mem_start,
- .node_mem_size = marvel_node_mem_size,
};
ALIAS_MV(marvel_ev7)
diff --git a/arch/alpha/kernel/sys_wildfire.c b/arch/alpha/kernel/sys_wildfire.c
index 2c54d707142a..3cee05443f07 100644
--- a/arch/alpha/kernel/sys_wildfire.c
+++ b/arch/alpha/kernel/sys_wildfire.c
@@ -337,10 +337,5 @@ struct alpha_machine_vector wildfire_mv __initmv = {
.kill_arch = wildfire_kill_arch,
.pci_map_irq = wildfire_map_irq,
.pci_swizzle = common_swizzle,
-
- .pa_to_nid = wildfire_pa_to_nid,
- .cpuid_to_nid = wildfire_cpuid_to_nid,
- .node_mem_start = wildfire_node_mem_start,
- .node_mem_size = wildfire_node_mem_size,
};
ALIAS_MV(wildfire)
diff --git a/arch/alpha/mm/Makefile b/arch/alpha/mm/Makefile
index 08ac6612edad..bd770302eb82 100644
--- a/arch/alpha/mm/Makefile
+++ b/arch/alpha/mm/Makefile
@@ -6,5 +6,3 @@
ccflags-y := -Werror

obj-y := init.o fault.o
-
-obj-$(CONFIG_DISCONTIGMEM) += numa.o
diff --git a/arch/alpha/mm/init.c b/arch/alpha/mm/init.c
index a97650a618f1..f6114d03357c 100644
--- a/arch/alpha/mm/init.c
+++ b/arch/alpha/mm/init.c
@@ -235,8 +235,6 @@ callback_init(void * kernel_end)
return kernel_end;
}

-
-#ifndef CONFIG_DISCONTIGMEM
/*
* paging_init() sets up the memory map.
*/
@@ -257,7 +255,6 @@ void __init paging_init(void)
/* Initialize the kernel's ZERO_PGE. */
memset((void *)ZERO_PGE, 0, PAGE_SIZE);
}
-#endif /* CONFIG_DISCONTIGMEM */

#if defined(CONFIG_ALPHA_GENERIC) || defined(CONFIG_ALPHA_SRM)
void
diff --git a/arch/alpha/mm/numa.c b/arch/alpha/mm/numa.c
deleted file mode 100644
index 0636e254a22f..000000000000
--- a/arch/alpha/mm/numa.c
+++ /dev/null
@@ -1,223 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * linux/arch/alpha/mm/numa.c
- *
- * DISCONTIGMEM NUMA alpha support.
- *
- * Copyright (C) 2001 Andrea Arcangeli <andrea@suse.de> SuSE
- */
-
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/memblock.h>
-#include <linux/swap.h>
-#include <linux/initrd.h>
-#include <linux/pfn.h>
-#include <linux/module.h>
-
-#include <asm/hwrpb.h>
-#include <asm/sections.h>
-
-pg_data_t node_data[MAX_NUMNODES];
-EXPORT_SYMBOL(node_data);
-
-#undef DEBUG_DISCONTIG
-#ifdef DEBUG_DISCONTIG
-#define DBGDCONT(args...) printk(args)
-#else
-#define DBGDCONT(args...)
-#endif
-
-#define for_each_mem_cluster(memdesc, _cluster, i) \
- for ((_cluster) = (memdesc)->cluster, (i) = 0; \
- (i) < (memdesc)->numclusters; (i)++, (_cluster)++)
-
-static void __init show_mem_layout(void)
-{
- struct memclust_struct * cluster;
- struct memdesc_struct * memdesc;
- int i;
-
- /* Find free clusters, and init and free the bootmem accordingly. */
- memdesc = (struct memdesc_struct *)
- (hwrpb->mddt_offset + (unsigned long) hwrpb);
-
- printk("Raw memory layout:\n");
- for_each_mem_cluster(memdesc, cluster, i) {
- printk(" memcluster %2d, usage %1lx, start %8lu, end %8lu\n",
- i, cluster->usage, cluster->start_pfn,
- cluster->start_pfn + cluster->numpages);
- }
-}
-
-static void __init
-setup_memory_node(int nid, void *kernel_end)
-{
- extern unsigned long mem_size_limit;
- struct memclust_struct * cluster;
- struct memdesc_struct * memdesc;
- unsigned long start_kernel_pfn, end_kernel_pfn;
- unsigned long start, end;
- unsigned long node_pfn_start, node_pfn_end;
- unsigned long node_min_pfn, node_max_pfn;
- int i;
- int show_init = 0;
-
- /* Find the bounds of current node */
- node_pfn_start = (node_mem_start(nid)) >> PAGE_SHIFT;
- node_pfn_end = node_pfn_start + (node_mem_size(nid) >> PAGE_SHIFT);
-
- /* Find free clusters, and init and free the bootmem accordingly. */
- memdesc = (struct memdesc_struct *)
- (hwrpb->mddt_offset + (unsigned long) hwrpb);
-
- /* find the bounds of this node (node_min_pfn/node_max_pfn) */
- node_min_pfn = ~0UL;
- node_max_pfn = 0UL;
- for_each_mem_cluster(memdesc, cluster, i) {
- /* Bit 0 is console/PALcode reserved. Bit 1 is
- non-volatile memory -- we might want to mark
- this for later. */
- if (cluster->usage & 3)
- continue;
-
- start = cluster->start_pfn;
- end = start + cluster->numpages;
-
- if (start >= node_pfn_end || end <= node_pfn_start)
- continue;
-
- if (!show_init) {
- show_init = 1;
- printk("Initializing bootmem allocator on Node ID %d\n", nid);
- }
- printk(" memcluster %2d, usage %1lx, start %8lu, end %8lu\n",
- i, cluster->usage, cluster->start_pfn,
- cluster->start_pfn + cluster->numpages);
-
- if (start < node_pfn_start)
- start = node_pfn_start;
- if (end > node_pfn_end)
- end = node_pfn_end;
-
- if (start < node_min_pfn)
- node_min_pfn = start;
- if (end > node_max_pfn)
- node_max_pfn = end;
- }
-
- if (mem_size_limit && node_max_pfn > mem_size_limit) {
- static int msg_shown = 0;
- if (!msg_shown) {
- msg_shown = 1;
- printk("setup: forcing memory size to %ldK (from %ldK).\n",
- mem_size_limit << (PAGE_SHIFT - 10),
- node_max_pfn << (PAGE_SHIFT - 10));
- }
- node_max_pfn = mem_size_limit;
- }
-
- if (node_min_pfn >= node_max_pfn)
- return;
-
- /* Update global {min,max}_low_pfn from node information. */
- if (node_min_pfn < min_low_pfn)
- min_low_pfn = node_min_pfn;
- if (node_max_pfn > max_low_pfn)
- max_pfn = max_low_pfn = node_max_pfn;
-
-#if 0 /* we'll try this one again in a little while */
- /* Cute trick to make sure our local node data is on local memory */
- node_data[nid] = (pg_data_t *)(__va(node_min_pfn << PAGE_SHIFT));
-#endif
- printk(" Detected node memory: start %8lu, end %8lu\n",
- node_min_pfn, node_max_pfn);
-
- DBGDCONT(" DISCONTIG: node_data[%d] is at 0x%p\n", nid, NODE_DATA(nid));
-
- /* Find the bounds of kernel memory. */
- start_kernel_pfn = PFN_DOWN(KERNEL_START_PHYS);
- end_kernel_pfn = PFN_UP(virt_to_phys(kernel_end));
-
- if (!nid && (node_max_pfn < end_kernel_pfn || node_min_pfn > start_kernel_pfn))
- panic("kernel loaded out of ram");
-
- memblock_add_node(PFN_PHYS(node_min_pfn),
- (node_max_pfn - node_min_pfn) << PAGE_SHIFT, nid);
-
- /* Zone start phys-addr must be 2^(MAX_ORDER-1) aligned.
- Note that we round this down, not up - node memory
- has much larger alignment than 8Mb, so it's safe. */
- node_min_pfn &= ~((1UL << (MAX_ORDER-1))-1);
-
- NODE_DATA(nid)->node_start_pfn = node_min_pfn;
- NODE_DATA(nid)->node_present_pages = node_max_pfn - node_min_pfn;
-
- node_set_online(nid);
-}
-
-void __init
-setup_memory(void *kernel_end)
-{
- unsigned long kernel_size;
- int nid;
-
- show_mem_layout();
-
- nodes_clear(node_online_map);
-
- min_low_pfn = ~0UL;
- max_low_pfn = 0UL;
- for (nid = 0; nid < MAX_NUMNODES; nid++)
- setup_memory_node(nid, kernel_end);
-
- kernel_size = virt_to_phys(kernel_end) - KERNEL_START_PHYS;
- memblock_reserve(KERNEL_START_PHYS, kernel_size);
-
-#ifdef CONFIG_BLK_DEV_INITRD
- initrd_start = INITRD_START;
- if (initrd_start) {
- extern void *move_initrd(unsigned long);
-
- initrd_end = initrd_start+INITRD_SIZE;
- printk("Initial ramdisk at: 0x%p (%lu bytes)\n",
- (void *) initrd_start, INITRD_SIZE);
-
- if ((void *)initrd_end > phys_to_virt(PFN_PHYS(max_low_pfn))) {
- if (!move_initrd(PFN_PHYS(max_low_pfn)))
- printk("initrd extends beyond end of memory "
- "(0x%08lx > 0x%p)\ndisabling initrd\n",
- initrd_end,
- phys_to_virt(PFN_PHYS(max_low_pfn)));
- } else {
- nid = kvaddr_to_nid(initrd_start);
- memblock_reserve(virt_to_phys((void *)initrd_start),
- INITRD_SIZE);
- }
- }
-#endif /* CONFIG_BLK_DEV_INITRD */
-}
-
-void __init paging_init(void)
-{
- unsigned long max_zone_pfn[MAX_NR_ZONES] = {0, };
- unsigned long dma_local_pfn;
-
- /*
- * The old global MAX_DMA_ADDRESS per-arch API doesn't fit
- * in the NUMA model, for now we convert it to a pfn and
- * we interpret this pfn as a local per-node information.
- * This issue isn't very important since none of these machines
- * have legacy ISA slots anyways.
- */
- dma_local_pfn = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
-
- max_zone_pfn[ZONE_DMA] = dma_local_pfn;
- max_zone_pfn[ZONE_NORMAL] = max_pfn;
-
- free_area_init(max_zone_pfn);
-
- /* Initialize the kernel's ZERO_PGE. */
- memset((void *)ZERO_PGE, 0, PAGE_SIZE);
-}
--
2.28.0