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powerpc/powernv: Add OPAL ICS backend

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OPAL handles HW access to the various ICS or equivalent chips
for us (with the exception of p5ioc2 based HEA which uses a

different backend) similarily to what RTAS does on pSeries.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt
2011-09-19 17:45:02 +00:00
parent 628daa8d5a
commit 5c7c1e9444
4 changed files with 266 additions and 6 deletions
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8
arch/powerpc/sysdev/xics/xics-common.c
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@@ -409,14 +409,10 @@ void __init xics_init(void)
int rc = -1;
/* Fist locate ICP */
#ifdef CONFIG_PPC_ICP_HV
if (firmware_has_feature(FW_FEATURE_LPAR))
rc = icp_hv_init();
#endif
#ifdef CONFIG_PPC_ICP_NATIVE
if (rc < 0)
rc = icp_native_init();
#endif
if (rc < 0) {
pr_warning("XICS: Cannot find a Presentation Controller !\n");
return;
@@ -429,9 +425,9 @@ void __init xics_init(void)
xics_ipi_chip.irq_eoi = icp_ops->eoi;
/* Now locate ICS */
#ifdef CONFIG_PPC_ICS_RTAS
rc = ics_rtas_init();
#endif
if (rc < 0)
rc = ics_opal_init();
if (rc < 0)
pr_warning("XICS: Cannot find a Source Controller !\n");