forked from Minki/linux
powerpc/64: Move MMU backend selection out of platform code
We move it into early_mmu_init() based on firmware features. For PS3, we have to move the setting of these into early_init_devtree(). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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@ -526,4 +526,6 @@ void ps3_sync_irq(int node);
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u32 ps3_get_hw_thread_id(int cpu);
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u64 ps3_get_spe_id(void *arg);
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void ps3_early_mm_init(void);
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#endif
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@ -759,6 +759,12 @@ void __init early_init_devtree(void *params)
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/* Now try to figure out if we are running on LPAR and so on */
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pseries_probe_fw_features();
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#ifdef CONFIG_PPC_PS3
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/* Identify PS3 firmware */
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if (of_flat_dt_is_compatible(of_get_flat_dt_root(), "sony,ps3"))
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powerpc_firmware_features |= FW_FEATURE_PS3_POSSIBLE;
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#endif
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DBG(" <- early_init_devtree()\n");
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}
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@ -58,6 +58,7 @@
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#include <asm/firmware.h>
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#include <asm/tm.h>
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#include <asm/trace.h>
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#include <asm/ps3.h>
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#ifdef DEBUG
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#define DBG(fmt...) udbg_printf(fmt)
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@ -872,6 +873,11 @@ static void __init htab_initialize(void)
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#undef KB
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#undef MB
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void __init __weak hpte_init_lpar(void)
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{
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panic("FW_FEATURE_LPAR set but no LPAR support compiled\n");
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}
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void __init hash__early_init_mmu(void)
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{
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/*
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@ -908,6 +914,14 @@ void __init hash__early_init_mmu(void)
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pci_io_base = ISA_IO_BASE;
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#endif
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/* Select appropriate backend */
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if (firmware_has_feature(FW_FEATURE_PS3_LV1))
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ps3_early_mm_init();
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else if (firmware_has_feature(FW_FEATURE_LPAR))
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hpte_init_lpar();
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else
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hpte_init_native();
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/* Initialize the MMU Hash table and create the linear mapping
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* of memory. Has to be done before SLB initialization as this is
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* currently where the page size encoding is obtained.
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@ -345,6 +345,7 @@ void __init radix__early_init_mmu(void)
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radix_init_page_sizes();
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if (!firmware_has_feature(FW_FEATURE_LPAR)) {
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radix_init_native();
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lpcr = mfspr(SPRN_LPCR);
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mtspr(SPRN_LPCR, lpcr | LPCR_UPRT | LPCR_HR);
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radix_init_partition_table();
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@ -261,7 +261,6 @@ static int __init cell_probe(void)
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!of_flat_dt_is_compatible(root, "IBM,CPBW-1.0"))
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return 0;
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hpte_init_native();
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pm_power_off = rtas_power_off;
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return 1;
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@ -306,7 +306,6 @@ static int __init maple_probe(void)
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!of_flat_dt_is_compatible(root, "Momentum,Apache"))
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return 0;
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hpte_init_native();
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pm_power_off = maple_power_off;
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return 1;
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@ -426,8 +426,6 @@ static int __init pas_probe(void)
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!of_flat_dt_is_compatible(root, "pasemi,pwrficient"))
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return 0;
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hpte_init_native();
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alloc_iobmap_l2();
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return 1;
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@ -599,10 +599,6 @@ static int __init pmac_probe(void)
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!of_flat_dt_is_compatible(root, "MacRISC"))
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return 0;
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#ifdef CONFIG_PPC64
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hpte_init_native();
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#endif
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#ifdef CONFIG_PPC32
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/* isa_io_base gets set in pmac_pci_init */
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ISA_DMA_THRESHOLD = ~0L;
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@ -273,11 +273,6 @@ static int __init pnv_probe(void)
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if (!of_flat_dt_is_compatible(root, "ibm,powernv"))
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return 0;
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if (IS_ENABLED(CONFIG_PPC_RADIX_MMU) && radix_enabled())
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radix_init_native();
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else if (IS_ENABLED(CONFIG_PPC_STD_MMU_64))
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hpte_init_native();
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if (firmware_has_feature(FW_FEATURE_OPAL))
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pnv_setup_machdep_opal();
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@ -226,9 +226,17 @@ static void __init ps3_progress(char *s, unsigned short hex)
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printk("*** %04x : %s\n", hex, s ? s : "");
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}
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static int __init ps3_probe(void)
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void __init ps3_early_mm_init(void)
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{
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unsigned long htab_size;
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ps3_mm_init();
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ps3_mm_vas_create(&htab_size);
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ps3_hpte_init(htab_size);
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}
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static int __init ps3_probe(void)
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{
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unsigned long dt_root;
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DBG(" -> %s:%d\n", __func__, __LINE__);
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@ -237,12 +245,7 @@ static int __init ps3_probe(void)
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if (!of_flat_dt_is_compatible(dt_root, "sony,ps3"))
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return 0;
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powerpc_firmware_features |= FW_FEATURE_PS3_POSSIBLE;
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ps3_os_area_save_params();
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ps3_mm_init();
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ps3_mm_vas_create(&htab_size);
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ps3_hpte_init(htab_size);
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pm_power_off = ps3_power_off;
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DBG(" <- %s:%d\n", __func__, __LINE__);
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@ -687,13 +687,6 @@ static int __init pSeries_probe(void)
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of_flat_dt_is_compatible(root, "IBM,CBEA"))
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return 0;
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pr_debug("pSeries detected, looking for LPAR capability...\n");
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if (firmware_has_feature(FW_FEATURE_LPAR))
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hpte_init_lpar();
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else
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hpte_init_native();
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pm_power_off = pseries_power_off;
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pr_debug("Machine is%s LPAR !\n",
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