[POWERPC] Workaround Pegasos incorrect ISA "ranges"
The Pegasos firmware doesn't create a valid "ranges" property for the ISA bridge, thus causing translation of ISA addresses and IO ports to fail. This fixes it, thus re-enabling proper early serial console to work on Pegasos. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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@ -2030,6 +2030,39 @@ static void __init fixup_device_tree_maple(void)
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#define fixup_device_tree_maple()
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#endif
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#ifdef CONFIG_PPC_CHRP
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/* Pegasos lacks the "ranges" property in the isa node */
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static void __init fixup_device_tree_chrp(void)
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{
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phandle isa;
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u32 isa_ranges[6];
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char *name;
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int rc;
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name = "/pci@80000000/isa@c";
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isa = call_prom("finddevice", 1, 1, ADDR(name));
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if (!PHANDLE_VALID(isa))
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return;
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rc = prom_getproplen(isa, "ranges");
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if (rc != 0 && rc != PROM_ERROR)
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return;
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prom_printf("Fixing up missing ISA range on Pegasos...\n");
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isa_ranges[0] = 0x1;
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isa_ranges[1] = 0x0;
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isa_ranges[2] = 0x01006000;
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isa_ranges[3] = 0x0;
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isa_ranges[4] = 0x0;
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isa_ranges[5] = 0x00010000;
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prom_setprop(isa, name, "ranges",
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isa_ranges, sizeof(isa_ranges));
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}
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#else
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#define fixup_device_tree_chrp()
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#endif
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#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
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static void __init fixup_device_tree_pmac(void)
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{
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@ -2077,6 +2110,7 @@ static void __init fixup_device_tree_pmac(void)
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static void __init fixup_device_tree(void)
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{
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fixup_device_tree_maple();
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fixup_device_tree_chrp();
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fixup_device_tree_pmac();
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}
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