[S390] Memory detection fixes.
VMALLOC_END on 31bit should be 0x8000000UL instead of 0x7fffffffL. The page mask which is used to make sure memory_end is on 4MB/2MB boundary is wrong and not needed. Therefore remove it. Make sure a vmalloc area does also exist and work on (future) machines with 4TB and more memory. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>hifive-unleashed-5.1
Heiko Carstens
Martin Schwidefsky
parent
ce26a8532f
commit
8b62bc9642
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@ -177,8 +177,6 @@ startup_continue:
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st %r0,4(%r3) # store size of chunk
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st %r6,8(%r3) # store type of chunk
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la %r3,12(%r3)
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l %r4,.Lmemsize-.LPG1(%r13) # address of variable memory_size
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st %r5,0(%r4) # store last end to memory size
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ahi %r10,-1 # update chunk number
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.Lchkloop:
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lr %r6,%r7 # set access code to last cc
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@ -293,7 +291,6 @@ startup_continue:
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.Lpcmvpg:.long 0x00080000,0x80000000 + .Lchkmvpg
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.Lpcidte:.long 0x00080000,0x80000000 + .Lchkidte
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.Lpcdiag9c:.long 0x00080000,0x80000000 + .Lchkdiag9c
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.Lmemsize:.long memory_size
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.Lmchunk:.long memory_chunk
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.Lmflags:.long machine_flags
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.Lbss_bgn: .long __bss_start
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@ -81,8 +81,6 @@ startup_continue:
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aghi %r1,1 # size is one more than end
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larl %r2,memory_chunk
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stg %r1,8(%r2) # store size of chunk
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larl %r2,memory_size
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stg %r1,0(%r2) # set memory size
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j .Ldonemem
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.Lslowmemdetect:
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@ -188,8 +186,6 @@ startup_continue:
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stg %r0,8(%r3) # store size of chunk
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st %r6,20(%r3) # store type of chunk
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la %r3,24(%r3)
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larl %r8,memory_size
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stg %r5,0(%r8) # store memory size
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ahi %r10,-1 # update chunk number
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.Lchkloop:
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lr %r6,%r7 # set access code to last cc
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@ -62,7 +62,6 @@ EXPORT_SYMBOL_GPL(uaccess);
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unsigned int console_mode = 0;
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unsigned int console_devno = -1;
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unsigned int console_irq = -1;
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unsigned long memory_size = 0;
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unsigned long machine_flags = 0;
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struct mem_chunk memory_chunk[MEMORY_CHUNKS];
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@ -486,6 +485,37 @@ setup_resources(void)
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}
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}
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static void __init setup_memory_end(void)
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{
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unsigned long real_size, memory_size;
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unsigned long max_mem, max_phys;
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int i;
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memory_size = real_size = 0;
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max_phys = VMALLOC_END - VMALLOC_MIN_SIZE;
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memory_end &= PAGE_MASK;
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max_mem = memory_end ? min(max_phys, memory_end) : max_phys;
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for (i = 0; i < MEMORY_CHUNKS; i++) {
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struct mem_chunk *chunk = &memory_chunk[i];
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real_size = max(real_size, chunk->addr + chunk->size);
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if (chunk->addr >= max_mem) {
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memset(chunk, 0, sizeof(*chunk));
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continue;
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}
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if (chunk->addr + chunk->size > max_mem)
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chunk->size = max_mem - chunk->addr;
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memory_size = max(memory_size, chunk->addr + chunk->size);
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}
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if (!memory_end)
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memory_end = memory_size;
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if (real_size > memory_end)
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printk("More memory detected than supported. Unused: %luk\n",
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(real_size - memory_end) >> 10);
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}
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static void __init
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setup_memory(void)
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{
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@ -642,8 +672,6 @@ setup_arch(char **cmdline_p)
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init_mm.end_data = (unsigned long) &_edata;
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init_mm.brk = (unsigned long) &_end;
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memory_end = memory_size;
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if (MACHINE_HAS_MVCOS)
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memcpy(&uaccess, &uaccess_mvcos, sizeof(uaccess));
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else
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@ -651,20 +679,7 @@ setup_arch(char **cmdline_p)
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parse_early_param();
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#ifndef CONFIG_64BIT
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memory_end &= ~0x400000UL;
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/*
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* We need some free virtual space to be able to do vmalloc.
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* On a machine with 2GB memory we make sure that we have at
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* least 128 MB free space for vmalloc.
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*/
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if (memory_end > 1920*1024*1024)
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memory_end = 1920*1024*1024;
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#else /* CONFIG_64BIT */
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memory_end &= ~0x200000UL;
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#endif /* CONFIG_64BIT */
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setup_memory_end();
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setup_memory();
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setup_resources();
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setup_lowcore();
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@ -110,12 +110,21 @@ extern char empty_zero_page[PAGE_SIZE];
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#define VMALLOC_OFFSET (8*1024*1024)
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#define VMALLOC_START (((unsigned long) high_memory + VMALLOC_OFFSET) \
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& ~(VMALLOC_OFFSET-1))
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#ifndef __s390x__
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# define VMALLOC_END (0x7fffffffL)
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#else /* __s390x__ */
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# define VMALLOC_END (0x40000000000L)
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#endif /* __s390x__ */
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/*
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* We need some free virtual space to be able to do vmalloc.
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* VMALLOC_MIN_SIZE defines the minimum size of the vmalloc
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* area. On a machine with 2GB memory we make sure that we
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* have at least 128MB free space for vmalloc. On a machine
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* with 4TB we make sure we have at least 1GB.
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*/
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#ifndef __s390x__
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#define VMALLOC_MIN_SIZE 0x8000000UL
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#define VMALLOC_END 0x80000000UL
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#else /* __s390x__ */
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#define VMALLOC_MIN_SIZE 0x40000000UL
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#define VMALLOC_END 0x40000000000UL
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#endif /* __s390x__ */
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/*
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* A 31 bit pagetable entry of S390 has following format:
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