From e942242784d0fe4bae957357dfa873af364c684e Mon Sep 17 00:00:00 2001 From: Thomas Bogendoerfer Date: Tue, 22 Oct 2019 18:13:15 +0200 Subject: [PATCH] MIPS: SGI-IP27: reduce ARC usage to a minimum IP27 uses ARC prom only for parsing prom arguments and has a hack for IP27 to make the ARC code behave. By introducing config symbol ARC_CMDLINE_ONLY IP27 only drags in ARC cmdline parsing and does everything else in IP27 specific code. Signed-off-by: Thomas Bogendoerfer Signed-off-by: Paul Burton Cc: Ralf Baechle Cc: Paul Burton Cc: James Hogan Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- arch/mips/Kconfig | 4 ++++ arch/mips/fw/arc/Makefile | 4 ++++ arch/mips/fw/arc/identify.c | 10 ---------- arch/mips/sgi-ip27/ip27-init.c | 14 ++++++++++++++ 4 files changed, 22 insertions(+), 10 deletions(-) diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 87bfefcbdb06..f7ec1505013c 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -675,6 +675,7 @@ config SGI_IP27 select ARCH_SPARSEMEM_ENABLE select FW_ARC select FW_ARC64 + select ARC_CMDLINE_ONLY select BOOT_ELF64 select DEFAULT_SGI_PARTITION select SYS_HAS_EARLY_PRINTK @@ -1351,6 +1352,9 @@ config MIPS_L1_CACHE_SHIFT config HAVE_STD_PC_SERIAL_PORT bool +config ARC_CMDLINE_ONLY + bool + config ARC_CONSOLE bool "ARC console support" depends on SGI_IP22 || SGI_IP28 || (SNI_RM && CPU_LITTLE_ENDIAN) diff --git a/arch/mips/fw/arc/Makefile b/arch/mips/fw/arc/Makefile index 3cc82d7fe548..64d685efcc77 100644 --- a/arch/mips/fw/arc/Makefile +++ b/arch/mips/fw/arc/Makefile @@ -3,8 +3,12 @@ # Makefile for the ARC prom monitor library routines under Linux. # +ifdef CONFIG_ARC_CMDLINE_ONLY +lib-y += cmdline.o +else lib-y += cmdline.o env.o file.o identify.o init.o \ misc.o +endif lib-$(CONFIG_ARC_MEMORY) += memory.o lib-$(CONFIG_ARC_CONSOLE) += arc_con.o diff --git a/arch/mips/fw/arc/identify.c b/arch/mips/fw/arc/identify.c index 7530c7b2fd39..5527e0f54079 100644 --- a/arch/mips/fw/arc/identify.c +++ b/arch/mips/fw/arc/identify.c @@ -31,10 +31,6 @@ static struct smatch mach_table[] = { .arcname = "SGI-IP22", .liname = "SGI Indy", .flags = PROM_FLAG_ARCS, - }, { - .arcname = "SGI-IP27", - .liname = "SGI Origin", - .flags = PROM_FLAG_ARCS, }, { .arcname = "SGI-IP28", .liname = "SGI IP28", @@ -103,13 +99,7 @@ void __init prom_identify_arch(void) */ p = ArcGetChild(PROM_NULL_COMPONENT); if (p == NULL) { -#ifdef CONFIG_SGI_IP27 - /* IP27 PROM misbehaves, seems to not implement ARC - GetChild(). So we just assume it's an IP27. */ - iname = "SGI-IP27"; -#else iname = "Unknown"; -#endif } else iname = (char *) (long) p->iname; diff --git a/arch/mips/sgi-ip27/ip27-init.c b/arch/mips/sgi-ip27/ip27-init.c index d160fb219d6d..971aa0d5d534 100644 --- a/arch/mips/sgi-ip27/ip27-init.c +++ b/arch/mips/sgi-ip27/ip27-init.c @@ -13,9 +13,11 @@ #include #include #include +#include #include #include #include +#include #include #include #include @@ -160,3 +162,15 @@ void __init plat_mem_setup(void) ioport_resource.end = ~0UL; set_io_port_base(IO_BASE); } + +const char *get_system_type(void) +{ + return "SGI Origin"; +} + +void __init prom_init(void) +{ + prom_init_cmdline(fw_arg0, (LONG *)fw_arg1); + prom_meminit(); +} +