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[SPARC64]: Detect sun4v early in boot process.

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We look for "SUNW,sun4v" in the 'compatible' property
of the root OBP device tree node.

Protect every %ver register access, to make sure it is
not touched on sun4v, as %ver is hyperprivileged there.

Lock kernel TLB entries using hypervisor calls instead of
calls into OBP.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2006-02-09 02:52:44 -08:00
parent 1d2f1f90a1
commit d82ace7dc4
12 changed files with 276 additions and 83 deletions
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20
arch/sparc64/prom/init.c
View File

@@ -18,7 +18,6 @@ enum prom_major_version prom_vers;
unsigned int prom_rev, prom_prev;
/* The root node of the prom device tree. */
int prom_root_node;
int prom_stdin, prom_stdout;
int prom_chosen_node;
@@ -41,26 +40,22 @@ void __init prom_init(void *cif_handler, void *cif_stack)
prom_cif_init(cif_handler, cif_stack);
prom_root_node = prom_getsibling(0);
if((prom_root_node == 0) || (prom_root_node == -1))
prom_halt();
prom_chosen_node = prom_finddevice(prom_chosen_path);
if (!prom_chosen_node || prom_chosen_node == -1)
prom_halt();
prom_stdin = prom_getint (prom_chosen_node, "stdin");
prom_stdout = prom_getint (prom_chosen_node, "stdout");
prom_stdin = prom_getint(prom_chosen_node, "stdin");
prom_stdout = prom_getint(prom_chosen_node, "stdout");
node = prom_finddevice("/openprom");
if (!node || node == -1)
prom_halt();
prom_getstring (node, "version", buffer, sizeof (buffer));
prom_getstring(node, "version", buffer, sizeof (buffer));
prom_printf ("\n");
prom_printf("\n");
if (strncmp (buffer, "OBP ", 4))
if (strncmp(buffer, "OBP ", 4))
goto strange_version;
/*
@@ -70,7 +65,7 @@ void __init prom_init(void *cif_handler, void *cif_stack)
* accordingly. -spot
*/
if (strncmp (buffer, "OBP ", 5))
if (strncmp(buffer, "OBP ", 5))
bufadjust = 4;
else
bufadjust = 5;
@@ -87,7 +82,8 @@ void __init prom_init(void *cif_handler, void *cif_stack)
prom_rev = ints[1];
prom_prev = (ints[0] << 16) | (ints[1] << 8) | ints[2];
printk ("PROMLIB: Sun IEEE Boot Prom %s\n", buffer + bufadjust);
printk("PROMLIB: Sun IEEE Boot Prom %s\n", buffer + bufadjust);
printk("PROMLIB: Root node compatible: %s\n", prom_root_compatible);
/* Initialization successful. */
return;