[PATCH v2 3/4] x86: cpu: Skip init code when chain loading

[Simon Glass]

When U-Boot is not the first-stage bootloader the interrupt and cache init
must be skipped, as well as init for various peripherals. Update the code
to add checks for this.

Signed-off-by: Simon Glass <s...@chromium.org>
---

Changes in v2:
- Drop the other check in interrupt_init() which is not needed now

 arch/x86/cpu/cpu.c            | 4 +++-
 arch/x86/cpu/i386/interrupt.c | 6 ++++--
 arch/x86/lib/init_helpers.c   | 3 +++
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c
index dae06949cc..3db035c2c0 100644
--- a/arch/x86/cpu/cpu.c
+++ b/arch/x86/cpu/cpu.c
@@ -239,8 +239,10 @@ int cpu_init_r(void)
        struct udevice *dev;
        int ret;
 
-       if (!ll_boot_init())
+       if (!ll_boot_init()) {
+               uclass_first_device(UCLASS_PCI, &dev);
                return 0;
+       }
 
        ret = x86_init_cpus();
        if (ret)
diff --git a/arch/x86/cpu/i386/interrupt.c b/arch/x86/cpu/i386/interrupt.c
index 4c7e9ea215..e67a116ac1 100644
--- a/arch/x86/cpu/i386/interrupt.c
+++ b/arch/x86/cpu/i386/interrupt.c
@@ -264,6 +264,9 @@ int interrupt_init(void)
        struct udevice *dev;
        int ret;
 
+       if (!ll_boot_init())
+               return 0;
+
        /* Try to set up the interrupt router, but don't require one */
        ret = irq_first_device_type(X86_IRQT_BASE, &dev);
        if (ret && ret != -ENODEV)
@@ -295,8 +298,7 @@ int interrupt_init(void)
         * TODO(s...@chromium.org): But we don't handle these correctly when
         * booted from EFI.
         */
-       if (ll_boot_init())
-               enable_interrupts();
+       enable_interrupts();
 #endif
 
        return 0;
diff --git a/arch/x86/lib/init_helpers.c b/arch/x86/lib/init_helpers.c
index 5bb55e256f..d906b528b3 100644
--- a/arch/x86/lib/init_helpers.c
+++ b/arch/x86/lib/init_helpers.c
@@ -30,6 +30,9 @@ int init_cache_f_r(void)
                        return ret;
        }
 
+       if (!ll_boot_init())
+               return 0;
+
        /* Initialise the CPU cache(s) */
        return init_cache();
 }
-- 
2.25.0.265.gbab2e86ba0-goog