Date: Fri, 10 May 2019 19:36:15 +0000 (UTC) From: Justin Hibbits <jhibbits@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r347463 - head/sys/powerpc/aim Message-ID: <201905101936.x4AJaFCT078159@repo.freebsd.org>
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Author: jhibbits Date: Fri May 10 19:36:14 2019 New Revision: 347463 URL: https://svnweb.freebsd.org/changeset/base/347463 Log: powerpc: Initialize the Hardware Interrupt Offset Register (HIOR) earlier for ppc970 Since we now have a much larger KVA on powerpc64, it's possible to get SLB traps earlier in boot, possibly even before the HIOR is properly configured for us. Move the HIOR setup to immediately after reset, so that we use our exception handlers instead of Open Firmware's. PR: 233863 Submitted by: Mark Millard (partial) Reported by: Mark Millard MFC after: 2 weeks Modified: head/sys/powerpc/aim/mp_cpudep.c Modified: head/sys/powerpc/aim/mp_cpudep.c ============================================================================== --- head/sys/powerpc/aim/mp_cpudep.c Fri May 10 18:25:06 2019 (r347462) +++ head/sys/powerpc/aim/mp_cpudep.c Fri May 10 19:36:14 2019 (r347463) @@ -68,6 +68,10 @@ cpudep_ap_early_bootstrap(void) case IBM970: case IBM970FX: case IBM970MP: + /* Set HIOR to 0 */ + __asm __volatile("mtspr 311,%0" :: "r"(0)); + powerpc_sync(); + /* Restore HID4 and HID5, which are necessary for the MMU */ #ifdef __powerpc64__ @@ -314,10 +318,6 @@ cpudep_ap_setup() case IBM970: case IBM970FX: case IBM970MP: - /* Set HIOR to 0 */ - __asm __volatile("mtspr 311,%0" :: "r"(0)); - powerpc_sync(); - /* * The 970 has strange rules about how to update HID registers. * See Table 2-3, 970MP manual
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